Most v-bottom boats in the 20ft range will pull just fine if you have a decent engine, and give you a nice ride too for cruising around. I think 200hp is ok for a 18 to 19ft hull with a light load of passengers, but on a 20ft hull, it will probbly struggle to pull a skier when loaded up with a gear. With engines, bigger is usually better (i.e. V-8 at least). I have a Four Winns 200 Horizon with a 275hp V-8 I/O and it rides and pulls great even with 5 people on board. If you do a lot of skiing, then maybe go with a v-drive tournament style ski boat for the best wake characteristcs. But you will sacrafice some room and ride quality. Jet boats like the Sea-Doos are fine for shallow water, but IMO, are gas guzzlers (usually need 2 engines on a 20ft hull), and don't pull as well as prop. driven boats.

__________________
'06 X5 4.8is, TiAg/black, cold weather pkg., comfort seats
'07 750Li, TiAg/black, sport pkg.
'05 Ford F350 silver met./slate gray, Lariat, 6.0 PSD, CC, DRW, FX4