The revo is a great vehicle, so is the LST 2 and a variety of other vehicles out there.
The good thing is you identified what it is you want to do. I was in your boat when I went into nitro and started with an LST 1. What very happy with it. Later went with a truggy and was even more satisfied as the handling was even better and it was a good basher too.
I would say if you really did the whole monster truck thing, the LST2 may be a better vehicle as you get that dual gear selection thing for a high versus low ratio, reverse, a much better radio and electronics and the price really isn't too much different. Also the spin starter is a nice little unit too.
This is no knock on the revo, it is a heck of a truck too, if it came with the same quality electronics it would be a draw to me at least.
I would just try and get the most bang for your buck, but ultimately you got to go with what makes you happy and if you are set on the revo, thats cool.
Oh, you may also want to try and look at www.ultimatehobbies.com
. there prices are good there usually as well.
I would say if you can swing it and your LHS has great customer service, throw them a bone and try to at least buy your support equipment and parts from them if you don't want to spend the money on the kit itself. If the difference is only about $20, I probably would go the LHS route .