Your long term brushless reviews...

[pipeous]

RC8 - Neu 2.5D, MM, Yuntong 5k Lipos, CCBEC, RCM motor mount.
Pros - out of the box it is dialed. very little is needed to drive fast. Very good rough track buggy
Cons - Center dif needs to be shimmed right away inside, could use little more steering. And make sure you get an updated kit or get the service pack. Also put a dab of ca on all the locknuts in the tower and under the steering plate or you need some funky bent tweezers to get them back if you need to take stuff off

B44 - Sidewinder 5700, Yuntong Lipos.
Pros - stock setup is dialed, chassis is sealed well so litle dirt gets in. A couple small mods found on rc10.com and it's just awesome (grub screw for front hinge pins and cut the rods a bit)
Cons - front shocks are too exposed and take damage on impact a little easy.

18B - Mamba 25/6800, Yuntong Lipos
Pros - Takes a beating. We run a lot and the only thing I have ever broken is the wing mount. Stupid fast. My most used rc.
Cons - again front shock shafts are very exposed and take damage, but the rpm front bumper solves that. Also the driven productions gear cover is a must or you'll be picking grit out of the spur constantly. Also needs upgrades to the steering servo save as the plastic gets soft fast and sloppy.

T4 - just got it, and it's still rtr. Ordered the JConcepts J82 conversion for it.

I am obviously an Associated fan. My first real rc was Associated. I like how they are tough and out of the box the stock setup is usually very dialed. I have changed little on most of them except tires, shock oil, dif fluids... minor changes to fit my driving style.