rhino questions

so we have been tossing around the idea of picking up a sxs for our camp. it will be used haul firewood, and deer, pull around our 5×7 trailer, and to cruise around on trails for fun. its not necessary that it has a ton of power, just not underpowered. stock tires, although whenever my 26" bighorns on my grizz get worn(aka never), they may end up on the rhino.

i see that basically i have 3 options. 450, 660, and 700. i think the 450 is too underpowered, but wouldnt pass one up for a good price. so between the 660 and the 700, are there any big reasons for one vs the other?

i have my old sheave from my 700. i heard that swapping those into rhinos make for some better power..