Huh? 
SSD’s completely decimate mechanical drives on read/write times, including raptors.
Data transfer is fast enough to saturate the main system bus.
Migrating to a Samsung 840 literally improved performance on my system 100% - everything from boot times to application launch was cut in half, and application performance (relative to disk activity) was effectively doubled.
Saved me from having to do a new build for about another year.
I retained a dual boot of W7 on a WD Black for web development uses…after living on the SSD a while, the black was so painful to use, I had to eventually move all my web development apps to the SSD.
OMMV somewhat, but I don’t know of anyone who’s gone SSD who isn’t a complete zealot for them.
QuBe.