I use this Acesonic AM-825 600 watt mixing amp.
http://www.acekaraoke.com/acesonic-a...ifier-usb.html
Its very flexible, and the price was right. Its got a built in BBE sonic maximizer... which I use with an external one as well... I don't use an EQ at all... and don't need one.
I can adjust the audio and vocals, and have a lot of control. Everybody always compliments me on the sound quality, although I am looking at some Yamaha 15"s to really add some serious punch to the whole thing.
The quality is full and rich, and even though I'm using 2-ways, I have a nice "mid" sound.
The features on this amp are really something, and its meant for karaoke. I spent a lot of time reasearching and looking for something that A) would fit in the budget, and B) offer the features that I needed. This amp rocks, and Acesonic is a great company to deal with.
Its rack mountable... a big plus, and has speak-on jacks. I'm using speak-on to 1/4" speaker cables. All the patchcord work is done in the rack... so all I have to attach is the microphones, speakers, and the DJ mixer and I'm ready to go... it takes me 15 minutes to set up, and that includes unloading the van!