Doesn't the place you're buying from offer delivery? Hell, even if it is a chargeable item, I'd be inclined to let them bear the responsibility of getting your new plasma to it's final resting place (your home).
Assuming it WOULD fit, what about getting some moron tailgating you and causing a rear-ender at he next stop sign/red light? Suppose you don't notice that moon-sized, crater'd pothole and nail it @ 30mph? In addition to getting a whole new front end, you'll now have the added heartache of owning a big box that now rattles. Alot. Planning to stop off at the tailor's or dry cleaner's on your way home, with that bad boy sitting in your back seat - for all the world to see? What're the chances of coming out with your goods, only to come upon a shattered side window and a large vacant place in the back seat - where your new TV used to reside? It's happened before.
FWIW, get the store to deliver and set up your new pride and joy. there's alot to be said for peace of mind in all of this.