go with the Ariens...I have a Toro with a Briggs&Stratton engine - it's been giving me trouble lately. It runs for about 45 minutes but then craps out. I've taken it apart a couple of times, changed the lines, fuel filter, checked the carburetor and can't find anything wrong.
I have to let it sit for awhile and then I can run it for another 45 minutes before it starts crapping out. I thought it might be a spark issue, but it doesn't appear to be.
I really don't know how good Arien is, but I'm PO'd at my Toro right now.