NewEgg has the OCZ Agility 3 240gb SSD drive on sale today for $239. This is the same one I just used in my new workstation and its been working great for me so far. This is a great price and together with another few recent sales marks SSD prices dropping below $1/gb.
Also AnandTech writes up their latest High End Buyers Guide and their SFF HTPC build is very close to my workstation build. Same processor, motherboard, case. Smaller SSD for only $20 less than the deal above, and they added a slot-based cable video input instead of the graphics card (since they did this as an home theater machine). Of course my HTPC is in an even smaller case and uses the external 3-channel video input and a slightly lower end processor.