I recently bought a ZAC Speed Exotec RP-3 chest protector. There are two versions depending on your storage needs. The RP-3 is the smaller version.
I have a couple rides on it so far.
This is by far the best chest protector I've ever owned. It is well made and has a lot of neat features.
The water bladder holds 3L and is made of this cool mirror like plastic.
The "back pack" has two zippered storage pouches on each side and a main storage compartment that is separate from the water bladder.
This compartment has a removable tool pouch.
There are two straps on each side to hold the chest protector in place-This thing does NOT bounce around at all.
Extra straps are included to convert the unit to a back pack, this is good for when you're doing trail work and don't need full coverage.
If you're in the market for a C P. Take a look at the ZAC Speed.
http://zacspeed.com/exotecRp3.shtml