Depends on individual needs and preferences, bro. Personally, I've always found the G30 a little more accurate; the G29 is an accurate pistol, but the G30 is SPECTACULARLY accurate after a few hundred rounds break in.
Recoil depends on the loads. Some .40-level 10mm loads will actually feel lighter in the G29 than hardball .45 in the G30; conversely, +P .45 in the 30 feels awfully close to full power 10mm in the 29.
You shouldn't go wrong with either choice.
Enjoy your retirement!