We are looking at purchasing a 2008 Tahoe Q5 SF. Main uses will be for fishing, towing inflatables (adults and kids) and general family fun on the lake and river. We are not skiiers, but there is a chance we'll have friends who might want to ski from time to time. The Q5 SF comes with a 4.3 L 190 HP engine, but there is an option, for an extra $2000, to upgrade to a 220 HP engine. Our question is: is it worth it to upgrade to the 220 HP? We want to have enough power to run the boat with 5-6 adults and are not sure that the 190 is enough; however, we don't want to upgrade if it's not necessary. Thoughts?? Thanks in advance!