Hey man, I'd like to start off by saying Welcome! No question is a stupid question here, as long as everyone is respectful.
So, if you wanna read user reviews, harmony-central.com has a great archieve of user reviews on, not just guitar but many other gears too. Here's the link to user reviews on Ibanez guitars, scroll down to the Jems and you'll find reviews on all of them.
Ok, here's all of the differences I can think of between the three guitars you mentioned. (I'm gonna be redundant here but bear with me) And my opinions.
7VWH: Alder Body, Rosewood (post '03) OR Ebony (uptil '03) fretboard, Evolution (which I think is not very similar to Paf Pros), Jem neck, All Access Neck Joint, Lo-Pro Edge or Edge Pro, depending on the year.
7DBK: Basswood Body, Rosewood fretboard, Breed, Wizard (II?) neck, All Access Neck Joint, Lo-Pro Edge or Edge Pro, depending on the year. Edge Pro for sure if you get it new.
777VBK: Basswood Body, Rosewood Fretboard, Paf Pro, Jem neck, Original neck joint, Lo-Pro Edge ('91 - pres) Edge (- '90).
For more information on neck specs:
For more information on pickups:
For more information on these or any Jem guitars:
Here is my opinion:
Between these three, I would personally get either the 7DBK or 7VWH. The original neck joint is the biggest fret i have about it. I have a 77FP and everytime I play that guitar I can't help thinking, Man! I wish this thing had AANJ. Between the DBK and VWH I would consider carefully. The 7VWH has more of a 'bite', where as the 7DBK has more of a 'growl'. There are sample clips on Dimarzio.com of Steve playing these two guitars in different songs. Breed and Evo both have better harmonic response than Paf Pro. Breed has a lot of mid and has a pretty high output; Evo has slightly less mid than Breed but has very high output. Also worthy of noting is that the Wizard neck on 7DBK is thinner than the Jem neck on VWH. So its a matter of preference. Again, if you had a chance to play these two guitars, you'll be able to make a better judgement. I've played a VWH (Lo-pro + ebony) and a 7DBK (edge pro) and I must say, the VWH blew me away. Ebony board is just gorgeous.
So there it is. Good luck to your search. Please do let us know how everything turns out!