Well I owned a Bobcat 753G that had McLaren steel OTT. They were great for moving dirt, flotation in mud, and increasing stability. The only thing that I found was not so great, was that the added height made grading a bit more difficult because you can't lower the heel of the bucket down far enough so you end up angling the blade downward, and then it digs in easier. Granted I was a real SS noob at the time so my experiences may be skewed.
I have used the Deere 322 CTL quite a bit in everything but snow. I can say that machine has great stability, floats well, and has gobs of power. The cab is kind of cramped mind you. I rent it as needed on jobs and the word from the rental shop is that it has been very reliable with no maintenance required on the undercarriage.
I will say that the style of tracks that you choose makes a huge difference. The standard 'pad' style tracks are great at not chewing up laws (especially when they're worn down) but they don't bite nearly as well as the more aggressive ridged ones like this
http://www.mclarenusa.com/nextgen-td...er-tracks.html