I wrote an article earlier this year for our Rose Week & on there it explains a little about grafted roses.
http://garden.org/ideas/view/s...
I personally prefer Weeks roses (brand name) over any other kind of rose. I've grown Weeks, Star, Jackson & Perkins, & Armstrong, plus others (Certified, etc) and, IMO, Weeks has been the strongest roses. Of course, my situation is much different than yours, so you'll have to figure out which roses work the best for you. I love both own root & grafted roses. If you want just own-root roses, I'd try www.rosesunlimitedownroot.com roses. They're all own-root roses and, while a bit expensive with shipping, sends out nice little own roots. I will NOT order from Heirloom again. I don't care for their itty-bitties.