My suggestion is to get what you want. Then go from there. However I would stay away from traxxas--they are not race cars, and if you want to run normal tracks as well, you will want a race car. If you are doing big air with downhill landings I would suggest a 4wd buggy. Simply put, you can manipulate a 4wd better in the air than you can a 2wd. And I have no problems sending my b44 25' through the air, albeit it is only 5-6' at the max off the ground, but if you have a down hill landing (backside of the double, triple or quad) you can get 10' high without any problems. Problems only arise on how you land. And any car can land bad, it is all about how you drive it.
Here is a story;
2 years ago we had a double jump in the middle of our front straight. The jumps were 2' high and 15' peak to peak. With my bj4 I used to have people stand on the second jump, and jump over their heads. And since I was clearing the second jump by a whole lot, I was even landing flatland. Yet I was able to do this regularly without incident (so long as there was no wind). However we ended up taking the jumps out. Too many stadium truck guys were complaining that they broke too many parts on it.
What is the morale? Any car can break on jumps, it is all up to the driver to be able to land it right. And since a 4wd is a little easier manipulated in the air it is easier to land right, but it is also easier to break if landed wrong. So get what you want, and learn to drive it.