Gravely users...need your help and opinions Looking for a 48" ztr (home use) and wondering if I am better off with the 148M or 48Z If I go with the 148M do I get the version with the larger air filter and 21 kawi or will the standard air filter model with a 19 kawi suffice? I ask this given I would like to mulch my leaves in the fall (north east). Also the model with the 21 kawi has 12 cc hydros vs. 10cc on the 19 kawi. Or....is the 48z enough for what I'm looking to acomplish? 1acre of grass, 15 or so 80ft maple trees Thanks...also if you have recently purchased either of these models, could you let me know where and price paid? My local dealer quoted $7,700+tax for a 148M KDZ....yet Speedway will ship the same mower to my house for $6,999 no tax Thanks guys...appreciate your help FYI...current set-up JD LX280AWS with powerflo bagger...I'm tired of bagging and would like to cut my mow time in half, if possible?