I'm not sure I'd call a Suhr a superstrat. I see it more as a higher quality standard Strat. The Wolfgang and its consumer versions are kinda superstrats, considering they were Van Halen's designs.
I've either owned or just played many EB/MMs, Jacksons, Kramers, and Charvels. As of last year however I've reduced my superstrats down to just an Ibanez RG550 20th and a vintage Kramer Baretta II.
Speaking of the Ibanez Prestige, it's a great value. It's very well made. My RG550 feels precise without feeling cold and mechanical. It feels like a violin, and I feel encouraged to play it lightly as opposed to hard like I might a Kramer or an ESP. I mean to say that my RG550 feels more efficient. I put less effort in, but get more back. Much of this comes from the Wizard neck and the Edge bridge, but also there's the general shape of the body and the scalloping.
The Charvel is my next favorite. The San Dimas is a very expensive guitar. Expect to shell out $3~4 grand. The lower $2,000 end will get you a cool graphic and a single humbucker config. I was always a one humbucker guy myself, being a Kramer nut that I am. There are consequences though to just having the one, especially if you're used to playing with three. You can get a HH config though. Most Charvels will be alder bodies with original non-recessed FRs and Seymour Duncan JBs and '59s/Full Shred/or Jazz pickups in the neck. This is a setup that will make you stand in front of a JCM 800 and scream, "I am Godzilla, you are Japan!"
The necks are smooth. Most are unfinished maple combined with maple fretboards. They feel like smooth heavily used Fender Strats, and that's a good thing. They are very responsive hot rods. The good news is, there's two new lines going for a $1000. The new San Dimas and the new SoCal use Korean FRs and some great pickups. If you're mostly an Ibanez guy, I think you might like the SoCal just a little more.
The Jacksons are getting disappointing. I am a fan myself, but you will be paying Charvel prices for the very best Jacksons (Select Series, custom, PC-1 signature). The MIJ Pro Series should be your minimum standard for a Jackson. The compound radius neck is nice. It feels smooth, and it is flat, but I found it a little cramped for my tastes. I just never meshed well. The best Jacksons IMO are the PC-1 which is a unique guitar and the Select Soloist. I'm a bolt-on guy myself. But at Select level, you'll unlock all the Jackson graphics options whether you go Dinky or Soloist. Jackson does make good guitars, but I've found more variance in their quality in the last few years than I care for. EDIT: The PC-1 is by all means a great guitar, and the neck is wide. You will have a difficult time demoing one without first buying it though.
The Earnie Ball Music Man. Arguably the Axis-Sport, if that's what you're talking about, is better than Peavey's own version of the Wolfgang. The one I played had a maple cap on basswood, and a non-recessed FR. I believe most use a Wilkerson bridge - not sure though. As with the Charvel, a non-recessed FR mounted MM will limit you a little with whammy bar tricks, but at the benefit of greater sustain... that's the way Eddie likes it. The neck is smaller, narrower. It's a world apart from the Wizard neck, but it feels comfortable even for my ogreish hands. The necks are unfinished birds-eye maple. That guitar sings. Look for one with the DiMarzio custom customs, designed for that brown sound. These guitars have great sustain. However, in the last year, I've seen more and more of them in stores looking rushed. Ultimately, I walked away from these because I wanted more sonic flexibility and more comfort when composing. Plus, I have my Les Pauls for when I want a big big sound. EDIT: I forgot to mention that the Axis I played had direct mounted pickups. I'm in the school that believes direct mounting = more tone and sustain. If you're not, then it's more of a hindrance than a feature.
I don't know anything about the others on your list from personal experience. I think you should also look into vintage superstrats. Pick up a vintage Kramer. Even look at a vintage Japanese made Kramer Focus. They will beat out most superstrats made today when it comes to quality. Also look for a Nightswan. My '88 Kramer Baretta II was made by a then little, somewhat unknown company in Japan called ESP. *wink* Great neck, and this guitar has outlasted most others with no surgery required. Also, take a look at vintage Peavey's like the Vandenberg. There's also the BC Rich Gunslinger, which was designed in part by Wayne Charvel as a superstrat that could compete against Kramer, Charvel, and Jackson. Sorry for the long-winded reply, but I hope it helps.