If you want a new Ibanez for 80's shred style stuff and money is not a problem check out a Jem7v, a UV or pretty much any of the Prestige RG's.
The new RG3520z looks nice , as does the RGT320z. The new 24 fret MIJ S's look good too. Plenty of nice new stuff on the Ibanez website. Don't overlook the RG1570, even though it's the cheapest Prestige RG, it's still a great instrument, and even with aftermarket pickups added in to the price, it's still very cheap for the quality level.
If you want second hand, as many others have said, any 5xx or 7xx series RG will do the job no problems as will a JPM or a Jem, but they might cost a little more.
If seven strings are a requirement, a second hand UV would be my pick, but the RG1527 is a fine guitar too.
There's plenty of Ibanez guitars that fit your requirements, so play as many as you can, and go with what feels right for you.
I hope you find exactly what you are looking for. Good luck.