My experience and suggestions:
I had an early 70s L (1500lb) and now have a kioti CK35(4300lb w/ loader). Use them mainly on 25 acre horse farm but have brought them to my 2 acre house. I have of course used 'garden tractors' in the past as well.
I doubt there is one 'easy' answer, or all purpose machine.
the L175 was bigger than a garden tractor. Deck change was old school but I hated it. Had to take it off to use the 3point or pto for anything. It was a driver over and I got pretty good at it (aka, less swearing). It's why I didn't even consider a MMM for the kioti.
Lift 'capacity'..it's a LOADER...so I keep being told. I get your pain..mine is a 5' wide bucket holds about 2 wheel barrow loads of dirt/etc. I can think that a BX is what, 1 wheel barrow load?
I can lift 1000lbs (measured) with no back weight. Never an issue with the bucket,but forks..yeah. Capable of 1800lbs they say.
Size..the kubota was OK on 2 acres. the kioti feels like a bull in a china shop and in the barn even more so. It turns tighter and has P/S which the kubota lacked, but still...tight.
I've done a lot of brush hogging (main reason I got the tractor) and am working on getting a 3pt finish mower - it's faster/more economical to run the 35hp diesel than the 20hp gas mower. Not sure i'm gonna like mowing next to the fence..but we'll see. It's why I have a mirror, right?
Hi range (kioti has 3 ranges) is a road gear only. Don't try and do work in it, pull a load or climb a hill.
Hydraulic speeds..it seemed fast when I got it - now I'm used to it and yeah, seem slow, but my only comparison was a skid steer - 3X the price..not a fair comparison. Compared to a shovel, rake and wheel barrow though...it's faster and a lot easier on the back.
My bucket is quick attach - easy peasy to change. ONLY way to go!
As for a replacement...
Bigger, more HP can do more work, or the same work faster. Downside is cost and physical size. Bigger is better BUT it's all a compromise. I can mow hills and do things with the kioti in complete confidence that scared the beejesus out of me in the smaller kubota. BUT i've had more ROPS hitting limbs with the bigger tractor. Implements are bigger - heavier, costlier.
For instance, I went from a 4' brush hog to a 6' one...450lb to 850lb, 5' long to nearly 9' long. turning around takes a LOT more room. And it cost 50% more to purchase.
I'd like a bx for some things..deck would stay on, in barn work and some things it would be more convenient..but what, $12K for that? Hard to swallow.
Think I am done with the BX25. In short, I have been dissapointed with it for a long time, and have been putting up with it to long. Just not sure what to replace it with? I really don't want a "Large" tractor. The size of the BX is fine, the capabilities are not.
Just so I am clear, my areas of frustration are:
1. The Loader lift Capacity
2. The Bucket Curl Capacity
3. Hydraulic speeds in General
4. No Power to run in high range
5. Small Front tires leaking constantly (although now fixed)
6. Difficulty installing front loader (I will never remove it again)
7. Difficulty installing MMM
From My Perspective, the BX was designed to Mow a lawn, move a small load of Bark, and dig up a water meter box. It will do more, but unwillingly because as designed, it is not really a true tractor.
I also realize that I don't want another TLB. Just a tractor.
BTW- I know a lot of you guys own one and love it. I mean this as no insult to you. Just need something that can work a little bit.