If you want to have the Raceseng Cascam front + Ohlins, take a look at what I ran before:
http://www.ft86club.com/forums/showthread.php?t=48679
Just keep in mind, the Cascam would be ideal if you want more caster or you want the fronts to be lower. Otherwise, it's a nice but expensive upgrade if your coilovers already have front pillowball adjustment.
As for rears, shock travel and ride height are not the same. Do not mix them up. Ride height is determined by your spring free height, spring rate, and adjustability of rear lower shock mount bracket.
-alex