The Focus is a great choice! I was "window shopping" at the NATS two years ago and found the Focus. As Lee Davis told me: "this plane will take you all the way to FAI". The list of winning Focus pilots is well published.
I fly Intermediate, but it's nice to know when I'm ready to move up, the plane is capable. Bottom line is the engine choice.
There are three power taxing maneuvers in intermediat: Outside loop from the top, stall turn with one roll on upline, and 1/2 square loop. Lots of power is needed to score well on these. Your 120 will get you by, but save your pennies for a Webra 145X (almost a"drop in") when you plan to move up.
The rave reviews and testimonials for the Focus far outweigh the few minor gripes about putting it togather by some....croz