Personally, I would go the route of the NHT's. Again, if it were me, I would go with the 3's all the way around. They're considered one of the finest speakers in the world under $1000 (that's if you believe everything you read in the magazines). Either way, they're unbelievably realisitc and I don't see how you could go wrong utilizing them. They're not real sensitive, so you're going to want to use a very hefty receiver. I'd recommend going Emotiva separates, but that's just me.
Also, Listenup has them for like $2500 for the whole 5.1. That's not too bad at all.