RE: Over/Under for Pheasant
I would suggest looking at Beretta and Browning, they both make a great O/U's. They are going to feel and fit you differently, I would suggest you go to a shop and try as many out as you can. As far as barrel lengths are concerned a 28" is a good compromise. Give a modified a try with 1 1/4oz or 1 3/8oz of #5's and call it good.
Nothing set in stone, your milage will vary, my $.02