Proven standard head tube which squillions of people have forks and headsets to fit.Can't for the life of me figure why they would stick to the old headtube instead of using 44m ZS :???: Other than that looks like a nice frame, interesting until that fact is noted, then it just slides away into oblivion for me and I'm sure loads of others
Most shops have reaming and facing kit
Lots of reasons to stick with proven good old standards.
Considering 44mm on higher end stuff, but by the time you get much higher you're into titanium and carbon prices.