I've been running a yamaha VMAX 225 2-stroke for a good while and really liked it. Now I'm shopping for new ones (150hp on a 20ft aluminum center console). I'm looking at Yamaha SHO, mercury 4-stroke, and mercury pro-xs 2-stroke. Anybody have any advice? I'll hit local lakes, Arkansas river, white river, and a trip or two down to big lake/Venice per year.