We need to replace our mower. Lot is 3 acres, cross fenced, and a number of trees. Looking at the current Husqy line and _maybe_ get a TS 248XD, maybe. But I'm puzzled by the specs for a 248 vs a 348. The 348 has 1 hp more and larger tires, and a K66ELD vs K46LD (248) tranny - this makes the 348 $700.00 more than the 248? Comments? Explanation?