I like Ibanez guitars... The Prestige models are good quality, and are pretty standard 7 string guitars.
OP: I would recommend going to sevenstring.org and having a look at all the GAS threads... There are many very nice guitars out there for $3000, and I cannot recommend any as I have never played anything that expensive. However, it will give you an idea what is out there and what is meant to be good. You could also consider going semi/fully custom to get a guitar to your specs.