At the Long Beach bike show in December 2005, the platform manager for the Street Rod was at the Harley display and I had the opportunity to talk to him. Truly, he is the man who sold me on the bike. During our discussion, tires came up and he told me they had the best results in testing with the Avon Venom R. He told me the bike handles 14% better with the Avons than with the Dunlops (how they quantified "handling" was not fully explained) and that he wanted the bikes to come with Venom R's from the factory, but could not because of a contract Harley has with Dunlop. You can base you choice of tire from that.
As for a 200 rear, I guess that might be ok if all of your roads are straight. For me, with mountain ranges full of second and third gear twisties, I prefer a narrow rear tire to make turn in light and neutral. I can discern the handling change from a three pound difference in rear tire pressure, and I find the R's steering is very sensitive to rear tire size, inflation and condition, more so than other bike's I have owned. Personally, I could care less how wide the rear tire looks. I want the tire that makes the bike handle best on curvy mountain roads.