Speaker recommendations for death metal...

I'll try to use the appropriate audio terms. Metal (death, grindcore, technical, progressive.) 300 BPM double-bass kicks drums, trem-picked A-tuned baritone guitars, so I think I'm looking for good transient bass. On the high side, trash and china and splash cymbals, but I want to hear each flavor of cymbal. Don't have to be towers, may scale down and do bookshelf-size and sub. Do I just get some used B&Ws? Budget, maybe $500/pair used.

I'm also thinking I may just build my next speakers, so also looking for any general input on engineering. Kind of tired of horns. I'm thinking I may want a sealed system, but open to suggestions including enclosure types, (sealed, transmission line, arrays,) baffle arrangements (MTM/D'Appolito, time/phase allignment,) drivers (#, size, brands,) x-overs (type, order,) etc. Thanks!

If I were to test such a speaker to an extreme:

Krisiun, Dying Fetus, Cryptopsy, Meshuggah, Decapitated, Strapping Young Lad, Opeth, Morbid Angel.

My current system:

Klipsch RF-3s (w/ homemade 10 lb. crossovers)
Nakamichi (some model, CD transport)
Adcom GDA-600 DAC (auction for 100 bucks)
Alesis 31 band graphic EQ
NAD C-350 Integrated (but also playing w/ Yamaha AX-900 a friend gave me.)
i agree with the cerwin vegas guy--they have death metal written all over them. alternatively, try to find some of the powered polk series rt-4000p or rt-2000p--which are easily available used for $500 or so and have a more refined top end than the cvs. they have integrated subs for the basshead in you.
Find some Voice of Theater speakers. They are large in size and can go very load.
Any speaker that is good for music is good for Death Metal. I love Cerwin vega. They were perfect for Skynyrd when I was in high school with a cheap Craig 8-track player. They're probably perfect for parties by the pool or the back porch.

You have a nice system- get good speakers that are fairly neutral and as full-range as possible. Buying cheap speakers will rob you of the nuances of the music you listen to- especially Opeth. The recording and mastering of their work is pretty amazing.

I listen to similar music and have been auditioning B&W, Definitive Technologies, Magnepan and Ohm. I currently use Pinnacle Classic Gold Reference, and will soon be buying Ohm's