John,
If you are a casual 2M op than the 910H will serve you well, but if you are a contest op, then I would keep the XV144. You will be disappointed in the 910H on 2M during a contest. Local stations and big power stations will show up all over your 910H dial underneath/overtop of the station you want to work.. There is a trade off when you step away from transverters.
Roger K8RS