I've owned honda, polaris, yamaha, suzuki and canam.. All but the polaris I'd recommend. I like the honda manual shift/sra for working, however for trail riding they can't match an auto/irs machine IMHO. Most people are looking for a dual purpose machine work and play, as such a mid class engine,IRS, auto trans with low range and good tires machine will suffice. Some models offer the option of locking the front diff for both tires to be turning, a nice feature for mudding, etc. My last yammie's had it and I used it a fair bit while hauling in camp or game out of tough terrain. Something you may consider in your research.

If your looking for a big bore, I don't think you can beat the canam. While the grizzly, king quads, etc are nice the canam is a beast!