Thanks for the replies. The main reason I picked the Kustom system(besides cost) is that home runs are used to run each speaker. Cat 5 cable is run from the amp to each wall control instead of speaker wire. I've got a 250' roll of in wall speaker wire I picked up from Home Depot that I used for my HT. Running the speaker wires and cables should be fairly easy except for one room. The wiring closet will be located in the basement near the utility room that has regular drywall over concrete block and is directly below the dining room so I'll remove the drywall where I need to and snake it up to the dining room. The other zones I'm planning on are kitchen, deck, bathroom, and 2 bedrooms which are on the top floor. I can run the wiring up the laundry chute from the utility room into the attic and back down into the closets of the bedrooms, same with the bathroom. The kitchen is the tough part, and I'll probably wait until I remodel the kitchen to add speakers to that room.
I am concerned about volume and under driven speakers though. I've got 4 JBL all- weather speakers for the deck, each 100 watts at 8 ohms. The Kustom system only puts out 20 watts per speaker. I'm also trying to figure out how to run 3 pairs of speakers(deck and dining room) off one wall controller that will be in the dining room. I e-mailed Kustom for more info, hopefully they'll get back to me soon.