ORIGINAL: Solman
If you have a 450 and have been practicing with the 120, don't be scared. Facts be known, you will eventually crash. It is a fact and I have done it many times. You have a perfectly good next step, don't be afraid. If you really want to invest into something else, get a sim. It is an excellent tool to have. I personally like the Phoenix. Flying heli's is all about muscle memory. When you can do it on the sim without thinking, you are ready to try it on the real thing.
The reason I was thinking of the 130 was to fly indoors. There just isn't enough room in the house for my 450! :-)