Do I need 3 coax inputs for a 921?

Hi guys:

I'm buying my first HD television and looking at leasing a Dish 811 receiver on an interim basis until I can locate/afford a 921 or its successor the 942 in a few months. Given that I eventually plan to have some sort of two-tuner HD receiver in my living room I want to make sure that when I upgrade my wiring now for the 811 I also do everything necessary for the future so I don't have to pull wires from my attic twice.

As I understand it, in order to properly wire a 921 (or future 2-tuner HD receivers) I will need three separate RG-6 coax cables running from my roof to the living room: One cable for the OTA antenna and one each for the two HD satellite tuners built into the 921. Is that correct or am I missing something?

right, I hadn't thought of a 2nd TV so I'll need 4!

Guess I'll really need to run 4 coax cables into the living room because I'll probably ultimately want to control the TV in my bedroom from the 921 as well since I only watch one or the other TV at a time, almost never both at once.

Four should be enough huh? No possible reason I would ever want 5?!!!

Luckily I have a one-story house with a full size attic so stringing cable around the attic is no problem. It's just the work of pulling it through the wall up to the attic which is much easier to do all at once rather than one-by-one. So it won't be a big deal to put 4 cables in at once.

My bedroom and living room are adjacent with just a wall and door separating so I'm assuming that remote control will be no problem with one of the new remote extenders. I've never tried to do it but can't imagine it will be a problem.