to clear up any confusion...
models of jems are..
jem jr(aka 333): super budget model with not so good quality parts, a RG350DX(or EX i cant remember) with the monkey grip cut into it. totally a gimmick in my opinion, stay away from this!made in indonesia i think.
jem 555: less budget than the Jr, difference being a half vine, and with dimarzio evos. can consider if you are short of cash, but the trem is not that stable with abuse i've read.try to get the 7 if you can...
mik
black or white
basswood
maple neck
rosewood fb
dimarzio evos HSH
LO TRS II Trem
jem7v: main production model. 'the real thing' imo.
specs as of 2008:
mij prestige
alder body
white only
maple neck rosewood fb
gold edge pro and gold hardware
2 dimarzio evos with a dimarzio custom single coil in the center HSH
(universe)UV777: production 7 string
mij prestige
black only
chrome hardware
edge pro 7
Blaze HSH
limited ed for the past few years, the JEM77v
mij prestige
black only
basswood body
rosewood fb
dimarzio Breed HSH
edge pro
there is no JEM777 currently in production, those are discontinued and are now very rare and valuable, as a rule of thumb, 777(early models) is the rarest followed by 77(limited ed for certain years) and then the 7v(current production)
ibanez has released sparkle blue, chrome, and a few other fancy jem colors over the years, but now it is the 77v in black, i myself am waiting for namm 09, hoping they release a new 77 in a different color.
cheers