I have no recent experience, but I have a 2004 model year Exmark I bought used in 2010 from a landscaper buddy that was getting out of mowing. I have beat the utter living crap out of that mower living on a rock patch, using it as a brush hog, rolled it in a ditch once, and it just keeps on fighting on. Finally had to use the local dealer for service last week as I had an electrical gremlin. $700 later with all new belts, couple new pulleys, oils changed, filters changed, some adjustments, found the chafed wire, and we are back to beating the crap out of it.
I've read on multiple other forums that flip a coin and buy by the pound, the heaviest mower you can afford. They're basically all using the same motors/hydrostats anyway and everybody is really putting out a good product, so choose the color you want and go.