Mr Produca,
While I don't have much experience with the highend stuff there are plenty of guys here that would be glad to offer suggestions that do have the experience.
To help them help help you please give us some more information.
1. Can you get by with one very nice channel or do you need to track more than one thing at a time?
2. Do you anticipate needing any stereo applications for the preamp?
3. If doing more than one thing at a time what else would you use it on besides vocals? Recording live intruments? DI bass guitar?
4. What else do you anticipate needing like; compression, EQ, built in de-essing features?
5. Do you want "colored" or "pristine and clean"?
If you already have some good EQ and compressors you can just focus on good no frills preamps.
If you don't have the ability to "de-ess", compress or EQ outside the pre then you need to focus on the preamps that include some of these features.
If you can list an artist or producer that is close to the sound you want it would really help people narrow the field.
Dot is extremely knowledgable and experienced with most (if not all) the current gear out there. Chessrok and Hard2hear are also very knowledgable and helpful but you need to help them narrow the field by telling us what you need and what sound you are looking for.
If you need like 4 channels the API Lunchbox has an option of using 2 Burr Brown chips that are said to be "warmer" that the stock more clean chips and you can have two channels of each (4 total) in your price range with some nice features as well.
While I am not really into hip hop but from what I have read on the budget/home recording level most of the stuff is samlples, PC soft synths, samplers, romplers etc that usually stay digital (but not always).