Keep in mind all SSDs are getting cheaper now that third generation SSDs are coming; not just the RevoDrive, but congrats!
If you like, you can test whether the TRIM function works when booting with my ZFSguru distribution. It should be one of two ways to restore performance on RevoDrive, as HDDErase cannot do this and Windows cannot either.
If you want to test this, give me a hint and i'll give you instructions.
I would not worry about performance degradation. The Sandforce drives can take a pounding before they really show a significant performance drop, unlike the older drives that use controllers like Indillinx's one. Some specific workloads negate the benefits of the Sandforce controller's compression function and also the benefits this function has on retaining performance, but these workloads are mostly working with random data. The only time you're really going to write random data is when you do full drive encryption or when you use a program that writes random data just for the sake of it (like IOMeter).