The Arc Audio KS 300.2 is a very nice little amp. I really like the way it looks, and if you didn't know it was designed by Robert Zeff, this man is a genius in amp design. You will be happy with this amp.
I have traded my Arc Audio KS 1000.1 for a Image Dynamics Q1200.1 this week and their was a pretty big difference in the performance of the two amps but under stand this is a $380.00 (Arc) VS a $1000.00 (ID) amp so their should be a pretty big difference. I will soon buy a Image Dynamics Q700.2 but for now I am very happy with the sound quality of the Arc Audio Amp on my Mids/Highs.
He is also right on the power of the Arc KS amp it will do rated power clean and clear but not much more, you could expect maybe 20-25 wrms more out of it but thats about it. Hook it up to you speakers at 4Ohms and enjoy the crisp sound.