Oats have many benifits beyond that of being a medium GI Carb:
Oats
Warming thermal nature, sweet and slightly bitter flavor, soothing, restores nervous and reproductive systems, strengthens spleen-pancreas, builds and regulates qi energy, removes cholesterol from the digestive tract and arteries, strengthens cardiac muscles. Can be used in cases of dysentery, diabetes, hepatitis, nervous and sexual debility, indigestion and swelling including abdominal bloating. One of the richest silicon foods, oats help renew the bones and all connective tissues. oats also contain phosphurus, required for brain and nerve formulation during youth.
There was a thread recently that discussed wholemeal/grain breads etc.. some wholemeal breads are still heavily processed and are high GI as a result. Stoneground was recommended by Bobo i belive. After that i think multigrain breads are a good second choice, but thats only my view search for the other thread.