Well, depends what head unit, I am pleased with my Kenwood though. They have some other models that aren't much good. As for the speakers.... probably nothing much special at all. I suppose it wasn't bad though. I would say, "I got this headunit for $200, and they gave me 4 free speakers!".Dcon, Skar, and the Obsidian are all great woofer choices for lower budget builds. Well, they're great choices either way. Dcon is rated at 300w, and it is surely capable of taking more. 400w is fine, 500w is probably okay too. As for the Obsidian and Skar, I would be comfortable giving them 1kW each, though I'd be skeptical about any more power than that, depending on enclosure specs and what not.