Looking for small powered monitors for around $300 or so and was considering these. Anybody have any experience with them? Recommendable? Alternatives? Thanks.
Depends on your application. They're quite underpowered and have very little bottom end (specs say 65 Hz, but at -10dB): 20W of power (shared between HF and LF) and a 4" woofer.
At this end of the spectrum, a shift in budget can make a very large difference.
The MSP3s run about $165 each. For $249 each, the KRK Rokit 8 with 90W and an 8" woofer offers much better bass response, and are biamped. Even if you need to stay within the $300 range, the Rokit 5 (5" woofer, 45W, $149 each) offers far better performance. IMHO, YMMV, all that.