If you go used, a Cambridge Audio D500SE is in your price range. It is a huge improvement over the older model HK I changer I used previously. If you own an old CDP with a digital out, you might consider an ART DI/O DAC. You can get one used here or new on the Internet for $200 or less plus the cost of cables and adapters. Requires the CDP have a BNC or RCA digital out. I now have that in my main system connected to a Sony DVP-S7700. Much better sound than the DVPs DACs. I don't know how it compares with the MSB, Datastream, or other DACs I have seen here in that price range.