You can install 2.5″ hard drives in the SH67H3. You need a 3.5″ to 2.5″ bay converter which gives the capability of installing 2 – 2.5″ drives.
I used the SilverStone brand bay converter on the demo unit I built and installed a Crucial M4 SSD drive.
The SSD drives increase the load and application speed considerably, they are well worth the money.
I can recommend the Crucial M4 SSD drives, as I have had no problems with these drives. I have read several poor reviews on the OCZ SSD drives, so do your homework before you buy one.
