I just picked up a pair of M-Audio 4"s w/tweets, preamped for around $160. They don't sound like something I'd rely on 'standalone', but they're perfect for being a decent center stage for my setup.... and honestly, for $160, I think they sound really good.
I need those in my life, lol.
Actually I'm cool with what I've got, but one of these days, I will own these... it'll probably be when the MK3s roll around, ha.
I picked up a pair of the 6" MK2s for my Pops and his Triton and they sound freaking amazing!