My standard blonde ale I make for the gf (primarily) gets only sterling hops. I usually use a kölsch or alt yeast, so my finished product probably isn't too far off from yours. I've found I like the sterling best, but I'd imagine (or in some cases know) crytal, ultra, liberty, mt hood, and so on all would be good. Most of these are US grown and easy to find, but are derived from German noble hops, which seem to go well in this kind of recipe. If you can't decide on one, try a couple. Just go with whatever flavors you like, based off the description.