The camber plates will be able to get you way more than -.75 degrees.
If you want set-it-and-forget-it type camber plates, you don't need adjustable ones. You could get the Dinan camber plates for $200, which are also less likely to give you NVH issues in the long run.
You could do what I did... I already have camber plates (installed by the previous owner), so I didn't need the extra camber from the M3 bits. Instead of doing the full M3 control arm conversion, I just did the upper control arm bushings... so I get the steering feel of the M3 bits without having to spend money on extra camber that I don't really need.
Also - if you don't plan to adjust your coilovers, why not just get springs/shocks?
2008 135i Montego Blue sport pkg, premium pkg, Logic 7 sound, iDrive/Nav
Mods completed: JB4+ & FBO || LSD || BMW-P suspension + F/R sway bars || 18" Breyton GTS-R || M3 front bushings || Vogtland camber plates || BMW-P rotors + Stoptech pads |||| Acquired, not installed: BMS WW Meth kit || Logic HVI intake || Mishimoto OCC |||| Shopping for: Summer tires