Metal!
If your going to play anything technical, you will want something with great playability and that is capable of low action.
BC RICH: although they are the staple of metal guitars, bottom line is : for the most part they suck. I have hated every BC rich product that i have played. Boring tone, horrible necks and bad playabilty.
Ibanez: Ibanez would be a good bet. Find a nice used Soundgear 5 string. Easy to play, nice tight string spacing so you can move around faster, great neck. ( also good for slapping, you know... if your into that kind of thing.)
No comment about the korean spectors.
Esp are nice basses. I have an f207 7 string guitar and i love it. I really want an h307...
But theyre basses are just as nice.
Check out a Peavey Grind(the natural wood finish ones with the exotic woods) They are in your price range and are extremely good deals.
No comment on any conklin with less than 7 strings.
but the 7 string groove tools basses are awesome.
Probably a bit too much for you though.
Im not sure if you could, but if you could find a used warwick(NOT rockbass) streamer standard, i would jump on that. those are great basses also.