Hello. I have a 2010 5083E. I installed a number of accessories and have found the right hand door to be very useful. It's true that there is not enough room to actually get in the cab from the right hand side due to the loader joystick. However, when hooking up implements, it is nice to not have to climb up into the cab from the left to get to the hydraulic/rockshaft levers. One can simply open the door, stand on the ground, and raise and lower the 3 point from there. It's a big timesaver and worth every penny. Plus, the door could be used as an escape hatch if one does happen to roll it onto the left side. I also think it looks better; the door kit comes with the right side step. It makes the tractor look more "square." In 2010 my tractor did not have an option for the buddy seat. After hearing that the cab on the E Series is the same as the M Series, I removed the left side upholstery and found that the mounting points were already there. It was a relatively simple task to install the seat. The other improvement I've made is the installation of the "true" air seat. After an 8+ hour day making hay, I could barely stand the back pain I got from the mechanical suspension seat. Deere has an option for a new air seat base that uses the existing seat for around $600. That base has limited adjustment. Thanks to TBN members' advice I bit the bullet and bought the full air seat with lumbar, swivel, etc. It was around $1200 but well worth it as my back pain has totally vanished. I sold the mechanical seat for $400 so it helped offset the cost some. I didn't like where/how the toolbox was mounted. Also since the toolbox was plastic, it seemed junky. I used the bracket from my metal JD toolbox and mounted it on the the front of the tractor where the weight bracket would normally be. Some might think it would be vulnerable there, but I have never smashed it into anything. If I did, a new toolbox would be cheaper than a buying a new grill or hood. I keep the plastic toolbox under the left side of the seat now. I put stick-on felt dots on the bottom and it doesn't slide around. I've also added the Power Reverser Modulation control, right and left outside mirrors, factory weather radio with CD, antenna, rear wiper (nice to have), block heater, horn, and 400lbs of rear wheel weights. My tires are not loaded, and it is noticeable from time to time as the rear end seems rather light. I didn't load the tires because my 2006 4320 had a small valve stem leak and the fluid leaking out was rusty. This will likely be my last tractor so I didn't want to replace the wheels in 20 years after they've rusted through. I keep my tiller on the back when using the loader for heavy work and it helps. The complaints I have about my tractor are that the PTO lever and rockshaft controls are hard to use. These issues have been addressed in the newer models. Overall I am happy with my tractor. I'm sure you will enjoy yours!
