I should clarify..I'm actually just making sure whatever unit will be able to record off of two different channels..but not necessarily at the same time..without me having to intervene between the two. I'm looking at DVRs b/c my VCR comes after my DirecTV receiver in the loop, and can only record the channel that my receiver is on at that moment. I'm wishing for something that I can program for multiple channels while I'm gone.

Two shows at the *same* time would be a really nice feature, but not a dealmaker/breaker for me.

Can anyone tell me how the Replay models (4000,4500) fit in with this, and compare to the DirecTiVo and UltimateTV? I'm assuming they'll work with DirecTV as well.