I think there are several Infinity owners out there who are extremely happy with their 360's, 361's and 362's.
This thread will give you a user review on the Ascend speakers and Boston Acoustics, which you could get a setup from either of those for around your budget... depending on the models. I personally owned the Bostons but I also owned the JBL Northridge series and thought they sounded as good if not better than the Bostons. The JBL's are going to be very similar to the Infinity 362 line.