I'm using a set of the Ness Fly Bars w/1.5" riser extensions and a back rest on my 04 KP and it's just right for me. I may try some apes sometime but this is pretty good. I've had them on other bikes and liked them except my hands would go numb after a while.
Sometimes you can find the Fly bars on ebay for much less than what a dealer would charge. Here's the link for the risers. Both are available in black or chrome.