HD XL Motherboard Failure - Evaluating Options

My Tivo HD XL boots up with a blinking green light (link to existing thread on this topic)

http://ift.tt/1YbtUjr

Called Tivo and here are the replacement options. What would you do?

Roamio OTA 1TB w/ Lifetime - available online now
Premier XL Refurb 1TB HD w/ Lifetime $120 less than Roamio OTA online
Roamio Base Refurb 500g HD w/ Lifetime $25 less than Raomio OTA online