CMV65,
I would suggest looking at the either the Race Tuner or the Power Commander USB version. As Zen suggests the Air Cleaner, Pipes although I am a bit skeptical about the 110 ftp of torque even with a pro tuning it as that would be nearly a pick up of 20-25 ft/tq improvement. Most people are seeing numbers 94 to 104 hp and 98 to 104 TQ with this combination depending on whether they are using SAE tuning or STD Tuning.
Another suggestion might be to get rid of your stock cam and look at something slightly more aggressive in harley you have 204 TQ cam comes in early dies around 4500 / 211 comes in later and runs till 5500 / 251 a mix of both cams / 257 higher end etc.
If you liked your S&S you may consider their 570 cam (gear drive) so that you have no issues with heads / clearances or a cam by Andrews that meets your driving wants.
Beyond that people have been seeing mid 115 's with head work / Cam such as SBCharlie's stuff.
It all depends on 2 things how much is enough for YOU and how much do you want to spend to get there. I think if you do some mild head work / cam change / race tuner or power commander you will be in the area your used to except that this bike may be a bit heavier and you will have to make concesssions for that weight and the batman fairing in the front at top end.
Hope this helps,