You might want to consider renting after looking at prices - Have you checked yet?
I have (3) HD boxes, all rentals. I have had to replace (2) of them because of being defective = as you know, just turn your rental in and get another one. It might be a good choice to buy, just depends on brand, price etc. Not sure what is on the market for purchase now, just have to research and see. Good Luck!