Lots of good choices about atm, a couple of Crucial m225's would fit the bill. With the latest firmware it supports background garbage collection (keeps the drive in top condition like TRIM and works in RAID, just make sure the drives are left to idle for a couple of hours occasionally). With your budget you could probably even spring for three - 180GB at >600MB/s reads, >300MB/s writes) *
The intel SSD's will work in an AMD system, don't think they have background garbage collect though (still, even "degraded" they are very very fast , probably faster 4k writes than a blank indilinx drive)
* before the "sequential performance isn't what matters!!!111" train comes along, I do know what i'm talking about. Provided you have a decent level of 4k performance to provide the snappy responsiveness associated with an ssd, sequential performance differences are what you will actually notice improving your system performance. Once your 4k performance is up in the tens of MB/s, your computer is spending so little time (unless you're running a database or benchmark) on the 4k operations, that you can't percieve the improvements. I'm planning to put together a thread with some rough numbers to justify this later.