I would only move to one of those if you do not already have the beginner in your bag. On day one I found the rossa dropped anything, however wild I aimed which led me to believe all that bosh about precision actually meant a damn. Day two onwards for the next month and I found the thing to be spasmodic at best, with a meter speed far in excess of what the blurb would have you believe. I found this to be the most frustrating of experiences although in fairness I am a dyed in the wool believer in the beginner being the most capable with anything under 30feet.
In my experience however, whatever you read here will not deter you from spending and learning for yourself, and why not? The best teacher is experience, but first you have to be willing to learn.
Lizzie xx