Are you in a remote area or tiny town? Pannys aren't all too hard to find. If it seems like most all your neighbors have a pickup truck as a utility vehicle, why not ask one for the favor? Might even make a new friend. You should find out how user friendly it is to use that PIP. I have a Panny LCD where it's a couple of clicks, but also a Samsung incredibly non-user friendly that I don't bother.
Plasmas are fragile. Shipping problems happen. Twice, with items nowhere near as expensive I've received it damaged only to fight merchant, contract packer & shipper - all daring me to sue as they all pointed to each other. Are you prepared to use small claims court? Stores get shipments all the time. Like I said, I've been burnt.
Trustworthy? Use no online vendor until you can confirm positive customer feedback on one of these: resellerratings.com, epinions.com or shopping.com. By the way, among the best the aforementioned B&H Photo & J&R Music World are in NYC as well as many shysters in Brooklyn.
My recent expensive purchases have all been made locally. First recommendation goes to experienced audio/video sellers. They have already survived arrival of the big boxes. Yes, like anything else, there are bad lemons. If it smells bad, walk away with no hesitation. Thing is there are six places I'd use in this city of 1/2 million. I go with competitive price info inhand & bargain politely but firmly. Any honest independent can save you time & maybe money by dispelling things he senses you do not need or understand. Be upfront with needs & budget.
Even at the big boxes price tags are only scraps of paper, not chiseled in granite. Floor department sales managers can negotiate prices. Ask if they can price match the competition. And oh, I'd would go for the 60U without PIP. It's ONLY your money.