If you decide to do it yourself, check rockauto.com. Remember that they always honor a 5% discount.
Personally I don't see the need for an oem clutch. I know a lot of parts we use should be oem, but as far as the friction disc/pressure plate/pilot bearing combo goes, I don't see a difference. Just follow proper break in procedure.
Also try not to slip the clutch if you can help it. You don't want to heat up the flywheel and develop hard spots in it or you'll either have to get it machined or replaced.
For the record... I bought a $90 clutch kit from them as closeout deal for my 626. I run about 320wtq on that engine (torque at the wheels) and so far a year in its OK... though I know its already getting there. stock torque was only like 190tq.