I am using a VansEvers Super Companion power strip for my amp and pre. Provides protection and some parallel conditioning and doesn't seem to limit my amp/pre. The conditioning the unit provides is subtle but I bought it more for the protection/non-limiting aspect of the unit.
I am thinking about buying some Blue Circle MKIII Noisehounds to go with it. These plug in to available outlets and also provide parallel conditioning. Some say they work well and others say differently.
For your front end, I would look at the Audio Magic Stealth Digital. I really liked it alot, cleaned up quite a bit of the grunge. I don't recall if it provides protection though, it did have a fuse on the back.
Good luck,