So I just got a 2004 7VWH and I’m curious about the 30th anniversary Jems as I found a good deal on one! Of course this would happen after I buy a 7VWH lol! Are they worth they hype?!
The factory setup on the 777 seems to be leaps and bounds ahead of the average off the shelf Jem that I've played (though I haven't played a recent 7V specifically), it has 1.5mm action at the 24th fret without any buzzing and from what I'm told that seems to be consistent with all of them. I own a 94 7V and I bought a 777 in 2017, I'll give you a few of my thoughts from owning it.
Day 1... Noticed the trem felt weird, tuning stability was good but not quite right... Turns out the backstop system was causing issues, disengaged it and that fixed all the issues I had. There is another thread about the backstop that I posted in just today on the same topic, people seem to have a love/hate relationship with the backstop but it's a rare feature.
Week 2... Noticed some fret buzz in the low frets, basically the neck just hadn't settled and so I had to make some minor adjustments quite frequently in the first few weeks/months... The guitar had been stuck in a shipping container in Japan for over 6 months due to CITES law changes that happened just as the guitar released, I'm guessing maybe the big change in climate/humidity had an effect, and with a guitar as finely setup as this it didn't take much to tip the scales.
Year 2... The neck has stabilised I haven't had to adjust the truss rod since those early weeks, tuning stability is amazing and it still plays without any buzz with 1.5mm action on the 24th.
Some notes, the guitar has a smoother sound than my 7V.. I don't know what it is but the 7V has a bit more bite to the sound in the upper mids and for the most part unless I'm playing delicate/smooth parts I prefer the more percussive and mid focussed sound of the 7V.. With yours specifically there is a significant difference in the trem also, the 777 has an Original Edge while the 2004 7V's have an Edge Pro, personally I prefer the Lo-Pro and Original Edge trems, but it's a minor sticking point.
If you can get a good deal on the 777 and you want a kickass guitar that plays like pretty much nothing else out there then yes I'd say grab the 777 30th.