a Fighter class you'll want to play till 20th level

[eclipsic]

You may actually consider going the tome rout here. Instead of +16/+16/+16/+16, do +16/+11/+11/+11, since the second attack in the usual iterative attack order still works this makes full attacking past the second attack viable without making things TOO easy on fighters.

I split the difference and went +16/+14/+12/+10.