After a lot of debate and back-and-forth in my mind, I've decided not to install the heads. I could have bought damaged goods off of ebay for next to nothing, but instead I decided to go with a reputable place and pay good money. I want what I paid good money for.
Parkway was again really apologetic and has filed a claim with UPS. UPS now has to come out and review the product and packaging to determine who was at fault. After much debate w/ the UPS lady, she finally shared some of the shipping guidelines with me (why was this so hard to get out of her, I don't know...). I suspect that since there was no styrofoam or bubble wrap, the supplier will be at fault even with shipping insurance... but we'll see.
UPS said that the product must able to withstand 'rolling' onto the dolly, as the delivery ppl cannot lift anything exceeding 70lbs. She also said some UPS conveyor belts are over a mile long, and parcels can drop onto the conveyor at any time.
I really hope this turns out ok for me. As I said, Joe at Parkway has been real nice and sincere, so I have total trust in their customer service.
I'll keep posting updates here, as I really appreciate all the support and feedback.
Cheers guys