I have a Direct TV Slim-line on the roof connecting to an HD 8 x multiswitch with 5 outputs to the home. 2 lines go to an HD DVR, 2 lines which go to HD21's (no Problem there), 1 line goes to a standard (older) multiswitch in the basement which goes out to 3 standard receivers (total of 6 receivers in the house). Simple enough for 2007.

Seeing that it is 2010 I'd like the three standard receivers replaced with HD's. Needing to keep my existing wiring (too many turns and basement construction), how can I accomplish this task. I know I'll have to purchase a SWM8 or SWiM LNB, but then how many splitters will I need? I can give additional info if needed.

Thanks!