Motorcycle Repair: performance upgrades, performance heads, true duals

Question
My friend and I are getting ready to have performance upgrades on our road kings. I have a 04' classic and he has a 06' standard. I have been doing a lot of research and there is a lot of different opnions outr there how to upgrade the engine.We both want good torque with decent horse power. 95'' ,shops recomending SE Performance heads and S&S 510 gear driven cams. I like the looks of the S&S 570 better for the heavy bagger's . I also like the Termanal velocity  programer with the o2 sensor and rinehert true duals. What do you recomend? thanks for your time!

Answer
If you ask 50 people about what to you you will probably get 50 different answers!
If it were me I would go with the 570 cams. You get a little more duration. I would go the the exhaust you picked. I am not familuar with the programer youa re talking about so it would be hard for me to give an opinion
Your best bet would be to go with the S&S kit that they make for the twin cam. In it you will get everything you need to change your bike the a 95 CI
Good luck and happy riding
Mike