AWD can just go more places, handles better and over all a much more capable car, esp for a basher. I know when I had a lot of power in my rustler, anything less than perfect traction would just spin the back out. It was a fraking pain. AWD plants and goes.
As far as the last two options, T4 and B44. These are light and fragile race trucks. They are not good for bashing IMO because they will just not stand up to abuse. The B44 is not that much bigger than a .5, but a .5 can be driven hard on an 1/8th scale track and be just fine.
Otherwise
Crt.5 vs 1/8 truggy:
Very easy conversion. Just as any other truggy. RCM + batt box=done.
Layout for 60mph run:
Racing them w/ Arct1k and RCM Mike @ the barn. I have the power toned down in this one, but see how well they handle the big 1/8th scale track and the huge jumps. You would be sweeping a T4 off this track as dust and bits.
Not trying to sell the truck, but just fairly compare to the 1/10 scale choices listed. Otherwise a Slash is fun, as are the other TRX veh (but 2wd.)
Lastly, I would highly recc a revo over the maxx. Its far more durable, yes its a bit more upfront, but you will save much more in the end w/ less hopups and replacement parts.