Charlie,
I'm a Felder owner, with a big jointer/planer and saw/shaper, plus standalone mortiser and dust collector. The fit and finish of the machines is awesome.
It is definitely true that you can spend more on the Felder, partly because they offer a range of options that the MiniMax doesn't. The Felder's also go larger. For example, my jointer/planer is a 20", which is 4" larger than the largest MiniMax offers at 16". Do I really need a 20" j/p? Probably not. Was LOML gonna let me get away with "Gee honey, I bought this 12" or 16" j/p a few years ago, but it really isn't big enough so I want to upgrade ..."? No way. I had one shot to do this, so I basically went top of the line. That included a whole slew of options on the machines, like keypad driven raise and lower on the j/p table. Changeover from jointer to planer means pushing a few buttons and waiting for the table to raise to my set point while I lift up the jointer tables and then swing the dust hood over. The shaper has digital height setting, although the version I got isn't keypad entry.
The Felder machines can be broken down to fit through a 30" door. That may be important to you. I had to get my machines down into a basement. As proof of that, I offer the attached pictures (I'm the goofy-looking guy in the maroon t-shirt). Because your shop is in the garage, this is probably not an issue and I'd guess that if you ever move you'll go to a place with good access. Still, if the ability to get through tight spaces with the machines is important, the Felder has advantages.
Knapp is also a high-end brand priced similarly to the Felder, but I'd spend some serious time trying to locate some support resources before I committed to buying their equipment. The Knapp brand has apparently cycled through a few different owners over the past decade or 2. The Robland/Laguna brand - I won't bash them, but would also spend some serious time looking at available support.
Now - MiniMax. If I weren't going to buy a Felder, I'd buy a MM. To me, that's sort of like going from a Mercedes to an Audi. Either one is way better than a Chevy Cavalier. I would strongly recommend that you join the 2 Yahoo Groups: Felder Owners Group and MiniMax owners Group. The FOG and MOG are both extremely important in terms of after sale service for whichever machine you buy and getting the most out of your purchases. The FOG has been around for several years and there are some extremely talented folks who have made FOG-built accessories. The MOG is newer and has had a little more focus on the bandsaws, but that's because the MM bandsaws sell so well. I will admit that the FOG has a crowd of folks who are pretty anal about dialing their machines in accurately and keeping them that way. The FOG and MOG are on "friendly" terms and really don't go around bad-mouthing each others' machines. There are folks who post on both; at least a couple of FOG'rs have posted on the MOG with some of the ideas that they have developed over the years to make using a slider/combo better. One great tip I got from the FOG was buying a narrow fork pallet jack to move the machines around. The forks slide into a channel underneath the machines and it's way easier to move them that way than with the mobility kits.
As a summary, I'd go with either the MM or Felder. If you are looking for a "basic" combination machine, the MM will be less expensive. If you want convenience or performance features, the Felder offers far more customizability. Ordering a Felder combo, even a "semi-combo" j/p or saw/shaper is like ordering a car. Buying a pair of them costs like a car. DAMHIKT. Felder also offers a "commissioning" option, where a factory technician comes out and sets up/dials in your machine in your shop. that's probably the best value Felder offers, especially if you're not the kind of person who really likes to fuss with machinery - you just want it to work.
Good luck on your decision.
Rob