I'm definitely leaning towards building bc having something that's "my own" is very appealing to me. Full disclosure, I did buy a 2008 Felt Z90 about a week ago from a guy I know for cheap. It's a bit of a heap as far as the components are concerned, but the frame/fort/seatpost are all in good shape, so I could accumulate some parts and swap on there. I know that's an entry level frame also, but any reason I shouldn't consider putting some OK parts on it?
Also, how about a CX or gravel bike as a road bike? I've seen several come up for sale near me for decent prices. Specifically a 2016 specialized Diverge.