Those NS-777 speakers are very nice looking speakers!
The two things that I'd like to point out about those speakers are:
1. The nominal impedance is 6 ohms. Most modern receivers will handle those just fine, but it's one of the things for you to look at when you are shopping. The lower the impedance, the more current the speaker will draw - and some receivers can't handle it, so they go into protection mode and shut off.
2. The sensitivity is 89 dB. The lower the sensitivity, the more power is takes to drive a speaker to a given volume level. You mentioned hosting parties - so if you want ear-splitting levels (without damaging the speakers), then you'll need a receiver that has enough power to do that. One way to damage speakers is to try to play them louder than a receiver can handle, and the receiver will go into clipping. So, to make it simple, if the speakers sound really strained - turn it down.
I'd recommend a surround sound receiver, even though you are going 2.1 for now. That would allow you to expand without getting a new receiver, and surround sound receivers are a better buy than stereo receivers (IMO) because they are more popular...so companies make more of them...and they are cheaper to produce.
I've got some general recommendations in that price range, but I want to go double check their power ratings first. I'll post again in just a few minutes.