hey was wondering which of these tractors is better if both similarly equipped and well maintained..looking at a 4450 with 4200 original hours and quad range..seems excellent in every way..also looking at a 4455 with 6500 original hours and powershift..also seems excellent in every way..which would you pick? asking price is 36,000 on the 4450 and 39,500 on the 4455. Any info would be greatly appreciated! Also..looked at a 4250 that is in excellent original condition..has the 15 speed powershift..runs and shifts excellent..the only thing is it has 9900 hours..asking price is 26,000..was impressed with how it started..was 20 degrees when i went and looked at it and it fired right up with no ether or plug in. Thanks in advance...Ernie