I have last years 2180, same as the LT2042. The LT2042 and GT2544 are the same tractor, just that the GT has larger wheels, seat. If they are close in price, I would buy the GT2544. I love my 2180, but wish the 42" deck was a deeper design. It doesn't allow good mulching performance, but it does cut very well. The 2hp difference is negligible, you're paying for the larger tires/wheels and seat and deck. Both machines can handle the same work load, pull the same amounts, etc. If its a small difference in price, I'd buy the GT.