I have been riding a 2001 MXZ700 for the past few years and am looking to buy a used 2004 or 2005 REV. I'm 6ft. 240 lbs and basically am wondering if a 500SS would be adequate or if I should at least get a 600HO. I ride mostly on wooded hard pack trails which can get pretty rough with the occassional open field, but not much powder. Most of the guys I ride with have 600s and some older sleds. I'm not really too worried about fuel consumption, but wonder if the 600 HO would be a noticeable difference over the 500ss and worth dealing with the potential ring problems. Thanks.