I ride steep and deep all the time on my 141 and I himark almost all the time in a group with a stock m1000 153, an 1150 cutler king kat 162, among others, of course the extra cc's have something to do with that. I'm not outclimbing the turbos, but most normally aspirated sleds, I either himark them or give them a good run for their money. I'm the odd man out here, but I don't ever want anything longer than a 141. I believe (and everyone has and will continue to give me crap about it, until they go ride with me), that a longer track does in fact give you more flotation and more traction, but it also weighs more (which hurts the increase of flotation going to a longer track), and it takes more power to turn a longer track than a shorter one, so it isn't always better to go longer. So, what I'm saying is that I may only have 141" of track going up a hill with say 50mph track speed, where the same sled with a 153" track going up the same hill will perhaps only have 40 or 45mph of track speed, because it has more weight to haul up the mountain, and the same motor can't turn a longer track as fast as the shorter one. The results, I've found is that the extra track speed and less weight make up quite a bit, especially when you add greatly to the stock performance of the machine without adding a significant overall weight in the process. My sled is by far the most fun sled I've ever ridden because I can hillclimb very well, and I still have the manueverability of a shorter track, and a very light weight sled compared to most 153's and longer which is easy to throw around making it even more fun. Of course, I don't ride a "stock" sled, but my point is that you can get a 141 to do pretty much everything you want it to if you set it up correctly and of course spend some cash. I know you didn't ask for all that, but I have always defended the 141's anytime I can, and always will. Just the results I've found and my $.02 on it.