If you have medium to large hands, and no intention of ever carrying it concealed, I say go with the P226.
So obviously if you have girly-man hands or plan to CC, advantage P229.
They're both great guns...well, apart from a few dimensional adjustments, they're the same gun. Handle each and see which feels more natural for you. That's really all it comes down to. I have a strange feeling you'll prefer the P226 (nothing but a hunch). So then you can later add a P228, P229, P220 compact, or (better yet) a P239sas as a carry option.
I have average sized hands and my P226 fits me fine. Even with the Hogue wrap-around grips that tend to thicken it up a bit.
"The Future is Unwritten"