I've built 7 HTPCs now and the last 5 have all used SSD as the primary drives with n x 1TB drives for storage of material. Very quick boot up at start and access noise to storage drives is only required when media is on there, the 1TB drives are almost give away prices in UK now at under £60 a time. Blu-ray/DVD/CD ROM drive playbacks and internet streaming avoid drive noise issue as well, so silence is guaranteed from the drives. The last 2 systems have used the new Samsung PB22-J 64GB drives Read Speed of 220MB/s Write Speed of 120MB/s Onboard 128MB Cache Samsung Controller Cheap for what they are at £140. Perfect drives for an HTPC
i love SSDs...so damn fast. I have heard that you need to research which ones you buy...apparently some are much better than others. But i guess thats usually the way it goes with all new products...still working the bugs out of them.
The newer Samsungs with the Samsung controller are very good. I like the one I quoted because its very fast. Things to remember are some don't like being put into RAID, as they are already internally RAID mode, and a no no with SSD is defrag, as it does more damage than good. The newer model OCZ drives are worth a look, the latest Intels are very good but riduculous money. My HTPC has the 64GB Samsung for the OS, and I download iPlayer content to it, as well as having a favourites music folder. I then have 2x Seagate 1TB drives for all the music and videos. I don't get any problems with playback from the Seagates even with Blu-Ray images.