T.
One of the problems that the aluminum deck Toros have is where the the wheels meet the deck.
During commercial use the pivot arms and adjusters take a beating. The notches for the adjusters are cast into the deck....and if and when the pivots wear or become loose....the adjuster pins will gouge out the grooves in the deck resulting in the wheels flying off in all different directions. This year Toro has finally addressed the problem by adding steel plates in those areas. Hopefully that will stop being a problem.
There are some other problems, but those problems can be attributed too any machine that is used commercially. Meaning:
Some commercial cutters dont pull maintainence like they should. They run thier stuff into the ground. They move way too fast and tend not to stop and fix the little problems that ocurr and those little problems tend too turn into bigger problems in a reletivly short time. Residential users notice the little things that go wrong...because they shelled out the bucks too buy the equiptment. Some employees are just trying make square footage and move on too the next job. They could care less if the front wheels fall off, as long as they can ride the rear wheels too finish a yard, finish the day, and get too the weekend. (Not intended as a slam on employees....but most dont consider it thier job too pamper thier equiptment and get maximum use from it.)
I am sure whatever
you decide on....will be treated with TLC. (Considering that you kept that Scotts 3-1 POS on the road for as long as you did, is testiment too how well you take care of your stuff.) A Toro should last you 50-60 years .