Just got a new amp, have a question...?

Congratulations! $100-$150 can be a good start. There are even dealers that even if to say your cash level is low they may just take the money (economical times may be on your side.) Sony amps from most I've known are pretty good (Sony being good brand name). With your specs, looks like you'll probably might look at 1 channel use (400W). Subwoofers are out there no matter what for the cash you. Styles, colors is going to depend on how far you search.