The front chassis brace looks fine. You may be able to straighten the driveshaft but get a spare anyway. I had a similar crash to this and when I stripped it down I found a broken fitting on the bulk head which was not holding the suspension arm brace in place. You could have a broken bulk head, or the sheer force of impact has ripped the thread out of the fixings to the chassis. As for the chassis, you may be able to straighten it out a bit with a wooden hammer or something that won't Damage it too much.
I have the turnigy ones, haven't had a problem yet. Though there are haters, apparently you can replace the tips with arrowmax ones. Which I will do eventually.
No mate, because I specifically want a 17t vented. I tried the answer rc one, which is no good because the teeth aren't flush with the housing. But if I needed a new one soon, I think I would bite the bullet and try the absima.