Been there, done that. Find my threads here on the matter going back a couple of years.
March 2011, with no more than six weeks' notice, my cableco went digital. I went through the five stages of grief, built a Windows Media Center box with a cableCARD tuner, and moved on.
It's 18 months later and I have no regrets. Four tuners and two extenders for remote TVs, plus commercial skip. I get the added benefit of HD--which doesn't rule my world, but it's nice to have.
That all being said, had my cableco not gone digital, I'd still have my three Replays...