Spacers are fine :tu: or you can go with a set of coils like I did. Check out my Gallery and this WRITE UP, which I did on installing my coils. As for the rear blocks, I'd steer south of those things and possibly opt instead for a set of AAL's (i.e. Add-A-Leafs) Personally, I think the ride is much better with AAL's than what you'll get with blocks. But the choice is ultimately yours.
Good luck...