[...]If my HDD has a limited amount of space left, I can't record that other program I want to 'buffer' without deleting some shows. This can occur VERY frequently especially because of how much space HD programming takes up.
If you're drive doesn't have enough space for two recordings, how will it have enough space for two buffers? The buffers are kept on the drive, AFAIK. Something has to give.
Also, I can't pause one recording and hit 'Live TV' or the down arrow to move to the other recording. I either have to go into the List and play the other 'buffer' to keep the pause point (VERY, VERY tedious) or hit the prev button and fast forward, rewind, etc. to the point I had been watching (again, tedious).
I just tuned to channel 72 and hit RECORD. I then tuned to channel 79 and hit RECORD. Now when I hit PREV, it has the same effect as hitting the down arrow on the HR10. It switches to the other buffer at the current point in time, just like on the HR10, IIRC. On the HR10, I remember having to RW to get back to the point I was at on the other tuner the last time I switched buffers.
And on the HR20, hitting RECORD again on either channel brings up a pop-up that offers me the option to stop the recording and delete the partial, something that was a multi-step, multi-screen process (and a real PITA) on the HR10.
Just my observations. /s