Warning...Newbie here..My original Tivo is dead. What to replace it with?

I was going to buy the Bolt straight from Tivo. But when I called customer service the Rep from who knows where? (When did that happen?) She said that I couldn't keep my $6.95 service fee. What happened to the wonderful customer service? So I went to Ebay and saw Series 4 with lifetime. How does that work since I have an original Series 2 with lifetime. I saw somewhere that you can't have 2 lifetimes on 1 account? The Tivo that is dead is the monthly tivo. My lifetime Tivo is fine (so far)

Warning...Newbie here..My original Tivo is dead. What to replace it with?