Thanks everyone, and glad I could help, swagger! Do it sooner than later, because one site I visited (dtvboxanswers.com I think it was) was going to take _72 hours_ to verify the coupon, and if there were some problem, at that point it would have expired and I would've been up the creek.
I decided to go with the Zenith DTT901 thru Circuit City; it had very good online reviews and the very nice customer service rep (in Virginia, who'd a thunk I'd have a native English speaker
) said he owned this unit himself. It comes with everything you might need, as I wanted to avoid having to run out for some stupid cable.
So if it all works out I have another coupon coming for another relative's TV and we'll do it again.
Lakeland Yankee, Thanks for the advice on playing with the antenna with the RCA box...when you say 'scan again' does that mean you have to do the whole remote setup again every time you touch the antenna???
(As you might guess, I am electronically challenged
.)