I own two machines, an ASV RC50 and a Bobcat S220. I was a Bobcat salesman for over 8 years and I've seen/heard and experienced both sides of the fence now. My first suggestion would be for you to demo the machines that fit the size, ROC, hydraulic flows, and engine hp's that best fit your application. The argument of which type of system (nonsuspended and suspended) costs more, is more complex vs. simple, etc. has been beaten to death on this and other threads. I will give you my opinion and experiences so far, and I'm sure others will too.
I don't completely buy into the fact that the ASV system costs more to operate compared to the unsuspended system. I sold the Bobcat tracked machines and maintain close ties to many of the salesmen I used to work with who still sell them, or have moved on to other dealers that sell other brands, most notably CASE and JD. All of them get pretty much the same track life(750-1000 hours) since they all come new with the Bridgestone tracks. I have over 1500 hours on my RC50 tracks and ultimately bought an ASV based on what I was seeing in the field and selling against. Of course, much of any track life can be controlled by the operator in the seat. Additionally, my ASV salesman just returned from the annual dealer meeting in which ASV released a program that reduces their undercarriage costs by as much as 40%. I am still waiting to see the details from him so that I can make my own determination. I will be the first to say that the ASV cabs are not as nice as the CAT of some of the others, but they are perfectly comfortable and in my opinion perform better than most of the others including CAT. I think it is because ASV focuses only on building tracked machines and not adapting a skid steer to fit to tracks (widths, ground clearances, hp to weight ratios, ground speeds, etc.). Once again, I think you need to check the machines out in the type of application you would be using the machine in. And of course, these are only my experiences. I'm sure others will chime in too. Good luck in your search.