I had a four winns with a 5.0 220HP that was aproximately the same weight (stock 3 blade prop). While you would not have the torque in the hole shot that a V8 provides, the V6 should provide ample power/torque to get your skiers up - especially with a hot prop. I would not worry about it unless you wanted to do more than 50MPH in the boat. or carry 8 people on a regular basis. If so, then definately opt for the V8.
One more thing to think of is resale. I don't have any insight into V6 vs V8 in this regard, but it may be prudent to see what the price differences are on used prior to making you decision.
Either way I doubt you will be disappointed.