Yeah it sounds like you just need to resolve the issues with your HTPC (or replace it) not move away from one altogether.

I'd love a box that did everything so I didn't have to have a computer in the lounge and I've been tempted before but I know it will just be a matter of time before I want to do something new. With the HTPC I can just keep changing and customizing it do pretty much anything I can dream of.