Hi All! I have been checking out the awsome site and reading up on the Rhino. I'm looking to purchase one soon for my family. We use to ride our bikes all the time (Cr500AF and wifes Banshee). Now that we have two little girls, we need something we can all go out in and enjoy together. I haven't decided on the 450 or 700 yet. The only reason I consider a 450 is because I'll proably put in a rotax later. I'm just wondering if the 450 will have enough power to get my family around with(2 adults and 2 40 lbs kids)plus weight of cage, seat and belts?