What tractor will you be using to pull/mount the MCS on??
Depending on the tractor, whether you have hills, and do you haul your leaves off your property or do you pile them somewhere to rot up, will depend on what you use!!
If you have a large enough tractor, and considering you have a "large amount" of leaves to pick up, it really comes down to how many times do you want to empty the system. With any "hang on the back of the tractor" bagger system or even the hydraulic lift MCS that I use, they just do not hold that many leaves, even after the are chopped up with the mmm and blower impeller. You will empty these types of systems often when picking up leaves.
The MCS that use bags, you have to physically remove the bags and dump them. This can get pretty tiring after a while.
So, we are down to pull behind systems. I do not have one of these systems, although my neighbor does.
I believe the most important thing to look at with these systems is, how effect does the dump work, and is the final place for the leaves at a location where they will be left to rot up. In other words, when dumping the trailer, do the leaves actually come out without you actually pulling them out and will the leaves be left there. When dumping leaves, the dump does not pile them, they slide out of the trailer and you have to pull forward to windrow them.
So, do you have to haul the leaves off your property to finally get rid of them or do you have a place that you can dump them and leave them to rot up?
Personally, I do not have a place on my property where I want to pile/windrow leaves to let them rot up over time. So, I haul my leaves to the township grass/leave/tree limb recycling site. I have had the rear mount bagger MCS over the years and have learned to know, them bags get pretty heavy after about the 10th time of emptying them.
I also have to get my leaves into my trailer to haul them. So, I chose the hydraulic lift MCS that JD made. I GTT member actually has one of these for sale on craigslist and on this forum.
Yes, I sacrifice volume, but I do not have to get out of the seat to dump it and I can dump them right into my trailer. With a 1 series tractor, you do need front weight on the tractor with this MCS. I use the Heavy Hitch front weight bar with 8 - 40 lb suitcase weights.
I haul three 14" long trailer loads of leaves off my property every fall. The hardest part of doing this is unloading the leaves off the trailer.