Im looking at a Toro or an Exmark. The Toro Z350 im looking at is new (leftover) for $6,000... Im also looking at a navigator demo unit with 100hrs on it for $8,000. is the navigator going to be a better investment for the extra $2,000? Ive used the z350 and like it, other than when it clogs. I cant demo the nav because theres snow on the ground, but i can only get this deal untill the 31st. Is the nav worth the $2,000 more?