Still have a 6290 in use. Both models are 2 of MF's best imo,suppose even the last 6290 is 15 years old now so it'll depend on what you can find as a lot of em now are getting towards the end of their working life. Having said that the 6290 is is an improvement over the 3120 .Can't fault my 3120 - just thought 6290 would have more pulling power but if not then I might hold unto the old girl and save my money!
I think if we change our thinking on kit we could be pleasantly surprised. I reckon we need to get more like the quarry men who will service on time and recondition a machine and take another working life out of it. Maybe these ultra new tractors not but definitely in the age bracket of the 6290 it is more than possible.