Your history suggests you have an acre (that has a pool and a house) and about 1.5 acres of woods. Most people suggest going bigger on your tractor. That can be good advice or it can be really poor advice. It really depends on what all you need (and will discover that you need) to do with your tractor.
2.5 acres is not that much. I have 10, but most of it is woods that is untouched, since it was last clear cut less than a hundred years ago. Getting the right size tractor is hard. There have been MANY words/posts/threads/discussions on it. There are probably as many opinions on it as there are tractors. Luckily, there is a wide overlap in capabilities. Similarly, you can use a machine that was designed for something else for many tasks. Some machines are very specialized and can done one and only one size task really well. Others can do many tasks of different sizes, at least reasonably well, but no task exceptionally well.
The BX (most of them) and the 1 series are both SCUT sized. The 1 series is big for a SCUT. That is an advantage for some things and a disadvantage for others. The BX (especially the 15xx and 18xx ones) are on the small side of SCUT. When I was in your position 15 years ago, I was told don't get one of "those lawnmowers dressed up as a Tractor". I listened and got something the size of a 2 series. Luckily, I looked at how much the mower for that cost and decided that I was better off just keeping my X300 for mowing. That was a VERY wise move as my CUT would be a very poor choice as a mower on my property.
Many years later, I now have:
- The X300, used only in the fall with my Cyclone Rake.
- An X534, my mower
- An X749, my baby tractor
- My CUT
I got the baby tractor because my CUT is too big and too cumbersome to use some places on my property. But, the baby tractor is way to little for some of the tasks I need a tractor for. A 1 series doesn't have the ground clearance that my CUT does, so it would be even worse off trail in the woods. It also doesn't have the lift capacity and reach that my CUTs loader does, so it would be less effective at those tasks. The X749 is way more agile than even a 1 series would be. So, there are a few driveway maintenance tasks for which it is an excellent tool that anything else would be a compromise. Since I lived here 15 years without it, it is clearly not a need. But it is to do the job at the level I want it done in the time I want to spend doing it, and it actually makes the job fun, instead of a chore.
As far as the advice on the BX goes, if you need PTO powered attachments, it probably isn't that good a choice. Tractor Time with Tim has a set of videos comparing the BX and 1 series they are worth watching. The BX is physically smaller, but it seems the 1 series is more agile. I see the same thing with my X300 and X534.
You could get the LGM for your X590 if you just want to move mulch. A real loader (which is still quite limited) for a super garden tractor is quite expensive. You get that if you don't have the space for multiple machines and your loader needs are minimal. If you don't already have trails and you want to create them, you probably need something bigger. If you make the trails big enough you can use a full size CUT on them. If you want something closer to horse trails, a CUT (and even the 1 series) is too big. Choose wisely, or choose again, frequently.