I put the heritage bars on my roadking and loved them. I also added the 4.5 inch pullback risers from HD. They were perfect. I was using a mustang seat at the time. With the pullback risers, I didn't need to get any closer.
Here's a goofy thought... I don't know what your typical riding footwear is, but try something different. I used to wear a dedicated riding boot, but lately have been wearing high quality work boots. Had them there anyway, wore them once, loved it, won't change. I've also found that it makes the ground a tad closer, knees are a bit more bent than before, and I didn't shed 400$ on a seat... Just a thought...