Stay away from chintzy brands like boss, audiobahn, pyle, lightning audio, etc. These brands have loose quality control standards, and you don't know what you're getting.
With your setup, it'll be a smart idea to get (power/gnd, and speaker) wires, a capacitor(eases your alternator's pain), and build. Without a foundation, your system will suffer immensely.
Brand names for amps I'd look at are: orion, crossfire, rockford, memphis, and alpine--not necessarrily in that order. I'd say go with a 1200w class D amplifier, because class d is more efficient.
Either way, it's all preference(sound quality vs. price), but please do yourself a favor and stay away from boss!!!

I think, I tinker, I play around, I build. '99 Contour W Ztc, ATX, HID Fog, mesh, A6, B LED, Big 3, Alpine cda-9827, Memphis lvs12 1200w, Alpine 1241, 4xInf K 6x8, Xfire 400/4, 7.2 LCD, glv box "xbox jack" mod, interior horn alarm mod