I currently have a Samsung S4120R TIVO hooked up to my Direct TV (its about 4-5 years old). My Hard Drive has died. So I will either replace the hard drive, or buy a used version of the Samsung Model I currently have to to replace it

However I will be switching to Direct TV with HD service in the early spring...Once we get a New TV (HDTV)...At that point I will Have To Have TIVO (we have a NON-TIVO DirecTV DVR in the bedrom, and it just does not compare and I cant stand it)...from what I can tell , the Hughes HR10-250 TIVO for DirectTV HD is the way to go

My question is this, instead of buying or upgrading my Samsung S412OR to get me thru a few months, then buying a HR10-250 in 3-4 months, Can I just get the HR10-250 Now, and will it work with my current Direct TV Service (Non-HDTV Direct TV service)

In other words, if I get the HR10-250 for HD Direct TV, but I dont have a HDTV or HD Direct TV Sevice, will it work and be compatable with my current standard definiton Direct TV Service?