John L. and company....
Don't worry about me, I'm never offended by another opinion about Cub cadets, especially loaders.
Having had the benefit of owning and running loaders on both IH built units and the later MTD SGT's, I am uniquely qualified to have an opinion on the matter. In fact I have the same brand of loader on both tractors.
I won't argue about AL rear ends, I don't mind them, but they bother some folks (AL's do have heavier ring gear carriers and stringer fine splined axles though).
When it comes to the length of the SGT frame and the addition of Power Steering.....NO CONTEST. If my 1872 had a cast iron rear end and 14hp Kohler like my 149 did it wouldn't bother me in the slightest........BUT I want the long frame and power steering. The long frame gives you a weight transfer advantage, but more importantly, frees up space on the operators platform for you to get on and off the machine.
Power steering is a GOD SEND with a loader, no way around it.
The thing about CC's with loaders is that they are so handy, but they are also very limited, and not just at digging ponds, but even just loading dirt, or a pallet of pavers....500-600# adds up fast in the bucket and CC's with loaders are operated "overloaded" 75% of the time. Some of the SGT features help to cope with this better than the std frame GT's, but either way, they are both incredibly useful machines.....once you have one, you will always have one