I don't think 7.25-9.5 would be that great - at the 12th fret you'd still only have an 8.85" radius. I think 7.25-12 would be really nice though - 7.25 for all your open chords, you hit the modern 9.5 at the 9th fret, and from 12th through to 22nd, you have 10.63 through to 12. I think that's a really nice balance.