I just finished my first year of doing my own hay. I to was looking hard at the Kubota M5 and M6 line, as well as Deere 5100E and 6 series. You can get a good deal on the little Kubotas, but they are light for some equipment, wasn't a fan of the shifting, and not sure I'd have been happy with the standard 8 speed. I also had a dealer tell me they stopped selling them because they had so many issues, but maybe he just wanted to push the other brand he had? I loved the Eco mode of the Deere 5 series, but wasn't a fan of the rating of the 3pt lift system. I loved the M6-111, I just couldn't find any good deals on one, and finally came across a low hour 6105E and bought it. No regrets so far, just wish it had the Eco mode on the PTO. The tranny isn't as easy to use as others, but after having a 12/24 hi/lo tranny, not sure I could go backwards now. It also has 38s, which I love for my rough fields, until I had to pay for one I destroyed and mounted it myself. So far I don't regret my tractor, or my baler NH BR7070 silage. Can't say the same for my cutter or rake.
Have never worked a 6e series, but I think ray is right on it. In a 6e you get a much better seat than a 5e. And I would not pay the extra money for the 5m becuase for the same price you can get a 6e with more weight and just a bigger tractor. Same cab same seat. Same engine. Same transmission????
But for the price of a new 95a Farmall fwa loader tractor (75k???) I would find a good used 7230 Deere, or a maxxum from 2007 or newer or even a 6430. Atleast you get a partial power shift transmission and much better hydralics. Even the 6105e is still open center hydralics.
I bought a maxxum 140 with the good closed center hydralics with 700hrs and loader fwa and all for 75k. Way way way more tractor than a 95a. Plus you get the cab suspension.
I found a 2015 maxxum 125 multi controler with 2000 hrs with loader fwa and pretty much every feature on it for 59k. But I needed a little more hp.
To me the seat in a Farmall tractor, new Holland t4 series, and Deere 5e are not comfortable for a full days work. Also all of those tractors mentioned I don't think any of them hold more than 35 gallons of fuel or so. You cannot run it a full day on one tank of fuel, but to me I cannot sit in one of those for more than 8 hours anyways before my butt/back starts to hurt.