Do you have direct tv ?

If you have cable you may want to see if they offer a PVR. While it probably wouldn't be as good as a tivo/replay but you could try it and see if you want a PVR or not.

I have been using Tivo for many years and currently have a 60 hour series 2 I did try a Replay TV for a short time.

What I did not like about the Replay TV was I want to be able to tell it to record a show evertime it is on regardless of what time or channel and it would not do this.

The things I liked better about the Replay were that it was much faster (tivo can be painfully slow going through menus) and it is very easy to extract the shows thanks to DVarchive.

You may want to do a search there have been many threads on this topic.