I currently have 3 standard definition DirecTV receivers w/TIVO and 1 HD Receiver w/TIVO(HR10-250.) Knowing that the deal with TIVO will end in about a year, what can I start to consider for upgrading and replacing my exisiting DVRs with TIVO? I have been with D* for over 8 years. I read a bit about the H20 HD DVR, but it isn't available yet. Is there a waiting list? When should a start to look at upgrading my units? Also, what will I do with my other 3 receivers with TIVO?