All these are good inputs BUT it depends completely on what you will actually be doing with your machine. I use a BX2200 with 211 loader, 60" MMM, and a 3pt PTO driven bagger. Have used it 14 years so far and very happy with it (bought used with 225 hrs on it, over 800 on it now.) On the weight issue -- depends what you mean by "light loader work." If that means snow removal and lawn debris there is no need to be concerned about rear weight. If you want to move sand, gravel, full loads of mud, etc. then yes, you DO need rear weight. I find the big pto driven bagger on the rear of mine is all I need for weight back there. Yes, your big butt helps, as does mine. Kind of thing where you can add weight back there when/if you really need it.
What are you going to cut brush with ?
A snowplow is not going to be much more effective than the loader for snow removal in part because these little machines are not heavy enough to avoid being pushed sideways by any angular snow pushing. On top of that the loader makes a great tool for placing the snow to heck outta the way. I use a small blade on the rear and leave the loader on in the front for best "driveway clearing" because that allows me to do removal in both directions without deadheading either direction. You are going to want to get very fluent with removal of the MMM for snow work of course. Makes a good time to sharpen blades when you take off the deck. I'm not big on all these various gadgets to hang on the thing -- bucket forks, quick hitch adapters, teeth, lights, etc. That's all entirely up to your preferences/needs.
One mod I did & like a lot is drilling a couple of holes in the bucket to allow me to bolt on a receiver hitch (from TSC, intended to be an add-on for a truck bumper.) That allows me to move utility trailers around with great dexterity. On/off with 2 bolts.
In my years with the BX2200 I have found the original hydraulic hoses are notorious for failure. Have had both the steering hoses and the loader hoses replaced. Usually one goes and you do both of them "while you're in there." The steering cylinder that sits laterally under the front is also notorious for leaking and some go all the way to failure. I bought 3 of these machine (1 for self, one for daughter, one for stepson) and all 3 have had some degrees of steering cylinder leakage. Mine is off & on and I am holding a seal kit ready to do it. Another of the three just had minor drips that come and go as mine does. The third failed to where you could not steer it & had to be rebuilt. Not very expensive. But common.
Good luck, keep us posted.