I just got me 08 2 months ago.
Put s&s 570 gear drive cams in from the get go.
5480 on the bike now.
no leaks yet, but many people didnt have leaks till much higher miles, so not sure if this helps.
how ever, i do agree with some of your theory.
i also put on d&d fat cat, arlen ness big sucka, and race tuner. lenelle fan.
i changed cams for some of the same reasons you dont like fact cams.
no overlap, bad duration, ect. basically an emission friendly cam. *hate it*
every one kept telling me to wait till break in for cams, but hell ofter 500 or 1000 miles the motor has been run so hot
damage is already done, IMHO.
After changed all maps, ve tables, cam timing my bike runs great, no heat problems, no starting problems.
Lucky so far I guess, but i will take it, right.
Hope this helps,.
O'yea , I would do it this way again.
dave