I just bought an RG1550M-PBL for under $700.
Personally I'm not a big fan of the Edge Zero vibrato (it's NOT a tremolo, look up the definitions of both words.
It's usually stiffer feeling on dives, it can sometimes 'clunk' when you do a heavy vibrato and it just looks too 'industrial' to me. (Keep in mind you can remove the ZPS3, but if you do you're really losing the whole point of the "Z" design.)
I like the Original Edge the best, but the Edge Pro is a great bridge, it's easy to work with, has a great feel and I can live with the string retainer bar, I have for over 20 years with my RG550CM.
The V7-S1-V8 pickups aren't bad, they aren't great, but they have a smooth, unique sound to them, and pups are always something that are easy to change.
I have an RG2570EXVSL with the Dimarzio/IBZ pups, and they are really geared towards metal. They are loud as <bleep> and voiced with the idea that you're going to have your gain and volume both on 11.
I'll most likely be changing the pups on my 1550, but I'm going to replace all the electronics so I can keep the original soldering in place if I ever want to put them back. (This is one of the reasons I really prefer a guitar with a pickguard, very easy to remove everything if you want, with only minimal desoldering.)
Just some opinions of mine, don't take any of what anyone here says as 'guitar gospel' as it's all to taste.
Play both, one of them may 'speak' to you, or both of them may not... if both of them do, one will 'say' more of what you want to hear, and you should buy that one.