well good choice with going honda reliable and there insurance plans are well worth it if something messes up they generally fix it with no problem
you could also insted of selling it put a lift NO MORE THEN 2 INCHS unless you get a whole custom suspension and some tires i suggest some itp 589's around 28 inches is perfect for the 400 series hondas there good on hard packed ground but also can sling some mud when it gets nasty
if i were considering going to a 650 or 700 i would go can-am they have a specific model made for 2 people with less body roll they have in line brakes with means less debre getting in there when riding they also have to rotek engine which is all trials mph and power bandits stronger then polaris,honda,yamaha, and kawasaki
the only think i like about the brute is it has a lever on the left part of the handel bars that gradually locks the front 2 wheelers so if you riding and bogging down you can five it a lil squeeze and pull out and if its getting worse you can hold it all the way down and its goes into full 4x4 so you cab get through it