Hey melon welcome,
First things first E92 > E46 M3 all day long, period. If you going for a looks thing, thats all you choice buddy. 2) There will not be an 07 E46 M3, the production has stopped on them for a while now. 3) There are lots of thread here on the forum about Manual vs. SMG, but the general concensus is that SMG > Manual in sheer performance capabilties and lazyness
Which I agree with as well. Alot of guys like stick for a "better connection/feel of the engine" but, its all how you look at it (the big picture, and daily driving)
Well, I hope that this helps a bit, and I look forward to seeing you here on the forums.