ok take a deep breath and read Rich's neck shimming tutorial on his site. I have been throughy the exact same problem as you with my 7vwh. My trem angle was dead on and i'd lowered the bridge as far as it would go but my action was still very very high, completeley unplayable. I am/was exactly the same as you been playing for years and never gone anywahere near my guitars with a screw driver! until Mr Harris website came into my life
The only solution is to shim the neck yourself. Its scary yes to take the neck off a $2000 (whatever price i guess) guitar you've JUST bought, but it will completely be worth it if you do it slowly and carefully.
This all leads me to become more and more dis-enchanted with ibanez
. WHY on earth sell a guitar that is unplayable without a shim, and then not shim it themselves!?!? Surely there are legal grounds for this as they are taking money for a product that needs further work to acheive the features/playability they say their guitars are capable of. Its disgusting.
I took the plunge though and now i've shimmed all my guitars, filled trem blades etc and learned a heck of a lot. Dex was right all along only he was being a bit of a c.ock about telling you, people should understand the frustration and panranoia after you've just dropped all that cash for your new baby.
One further bamboozling fact though is that it appears that the US ibanezs (RG;s for sure) come PRE-SHIMMED cause i bought a 7620 whilst over there and lo and behold it was fine and shimmed. I dunno
good luck with it anyways if you're sitll not sure and you can manage then its not worth damaging the guitar for (which you wont unless let a monkey follow the tutorial). However if the guitar isn't playing right and you've paid all that money its almost worse than having a go and botching it up...at least you will have tried!