I say if you're going to take the time to make a nice quilt, go ahead and spend a few extra bucks on the extra wide backing. I wish there was more variety, but solids are fairly common. Most quilt stores have some, and if none do locally, go ahead and do the net. Pieced backs aren't out of the realm of possibilities, though personally I like a solid back. If nothing else, how about a reversible with something simple on back?
Ruth, how did you know what I was doing with my 40% off coupon today? Going for forest green, though I’ve stocked up with coupons on red, royal blue and a cream colored paisley. Three yards of the extra wide goes a long, long way!