As for cold weather lx3310 -- with the block heater plugged in I have started without a problem -10F several times. As for maintaining temps - when that cold and running snowblower at 2500rpm temp stays middle. If running more like 2000 rpm for other stuff, I use the magnet grill covers that are sold on this site. On a -5 day with the covers on, it was actually running hot. So, in short - I have not had winter problems with mine in very Northern MN.
As for news a LX4010 is on the the horizon - that pains me - the lx33 is on the bottom edge of my needs, but needed mid-pto and didn't have the budget for the L60 series. It always happens - the product you really needed is avaiable a two years later.