I have done the front end conversion.
All depends how far you want to go, if you want it to look like the original picture you posted then you will need the following:
1) LCI Msport Bumper (with all mounting gear, LCI grills, fogs, lower grills etc) the bumper is straight forward install through a shop.
2) LCI Msport Splitters
3) LCI Hood - Straight forward install
4) LCI Xenon Headlamps - Trickier, depending on your FRM and production date of vehicle, also, you have to consider if you want LCI Halogens, LCI Adaptive Xenons or LCI Non Adaptive, your easiest route being LCI Halogen, if you want LCI Xenon, then you need to replace ballasts, bulbs, possibly FRM and some coding.
As for the rear.
1) LCI trunk Lid
2) LCI Rear tail lights, outer & inner, repin and wiring, perhaps some coding.
Easiest route here is to look at my Group Buy for LCI STYLED lights for our PRELCI vehicles.
http://www.e90post.com/forums/showthread.php?t=656252
I would say your Mtech Kit right now looks great man! perhaps just update the headlights to LCI & add some splitters. Mtech is hard to come by!
Here is my PRELCI to LCI conversion, with stock LCI bumper.
GOOD LUCK!