Some of the older Boss amps were very good, at least competitive with other solid brands. But I believe they changed the design and are using a low cost manufactureer.
Anyway, I hear that only the JBL BP mono amps are great and their regular line is just average. Either way, I would get
this US Acoustics USX-4065 for $123 before that JBL. More power, less cost and a solid product. If you ever think you will want to get components or a subwoofer, I suggest getting the USX-4080. More power and under your $200 budget. You can use two channels for the front speakers and bridge the other two channels for the subwoofer.
I just looked up the Pioneer speakers. They are rated at 50W rms. I would not worry about using any of these amps with them if it is set up properly.
