Before you throw in the SSD consider this. I stream 1080P from my server/ gamer rig upstairs to my HTPC in the lounge via Gigabit Lan.
I through in a 60 GB Vertex II and ended up distraught.
SSD's in general do not have any cache. So my HTPC grabbed a chunk of film, played it, then grabbed some more film. The result was horrific. Stuttering every few seconds.
I tried all media playing software to see if any had a way of coping with this built in, but none did at that time.
I ended up putting my HDD drive back in and selling the Vertex 2 after only a few days.
If you are streaming SDD is not the way to go in my experience.
Just thought it worth mentioning.