I am not overly thrilled about the SE Stage II upgrade. Your increased power is going to be 10-12% over what you have right now. I hate to give numbers because each dyno can be a little different. But I suspect the $1500 is for the parts, not the installation and the tuning. This is where my reluctance to support the upgrade comes in. Most riders installing this upgrade are expecting significant dyno numbers and this upgrade does not deliver. You can get more HP from a good cam and custom tuning. The SE 255 is an emissions compliant cam, so despite its specifications of high lift, it is essentially a 'stock' cam on steroids.
But if you are looking for torque under 3500 RPMs, the SE103 stage 2 is not too bad. Custom tuning can wake the engine up, but you end up adding another $600-1000 for SE Super Tuner and Dyno Tuning over just using the SE Stage II download.
So for raw dyno numbers and ridability, I still like the CycleRama CR-575 in a TC96 or 103 engine.
nightrider.com / tuneyourharley.com