Cricket23
Go for it, it's a great, fun aeroplane. I'll pretty much reinforce what others have said. The M160 is a useful performance increase over the average flying club fodder, and in my opinion is nicer for aerobatics than the M260. It is considerably lighter in pitch when loaded up with 'g'.
All the 'M's have inverted systems without limitation (other than a 10 sec zero 'g' limit) and will stay upside-down until you run out of fuel.
The M260 'feels' like it has more than 100 hp up on the 160 and is a real hot rod. It accelerates on a hard runway like a TVR, and as DB6 mentioned, will very quickly get you to FL nosebleed (for a piston trainer).
None of the M Fireflys have a sparkling roll rate, but are capable of some pretty sporty aeros. Go to an airshow this year and try and catch DEFTS' Alan Wade displaying the M260. It's absolutely eye-watering to watch.