My 2006 1.3 MTJ Dynamic was starting to have more problems than I could be bothered with so, after having a look around, I went for a good deal on a new 4x4 MTJ Panda in March. It is a really nice motor, but because it is a bit bigger and much taller, it isn't nearly as much fun in the twisty bits as my old MTJ Dynamic. Whilst we are getting on fine, I do miss the old girl and the new one hasn't quite managed to grab me yet like she did. Personally, I wouldn't touch a Stepway. Neighbour has one and I really don't like it. The phrase modern-ish Lada springs to mind!
So, what would I do today. I'd probably go for a great deal on a new, or nearly new, MTJ 4x4 again, or maybe the MTJ Trekking. The reason is that I can't see any other motors available that is are as small, as roomy or any better.
There is the issue with the diesel particulate thing on these modern MTJ units, which you may wish to consider before going further. It can be a pain in the bum because once the light comes on you are supposed to keep driving at reasonable revs until the light goes off. If you do decent length journeys you would probably be OK. If not then maybe the TwinAir might be better and you then have the whole Panda range to choose from. Some folks love Pandas with TwinAir engines. I took a 4x4 for a test drive, but didn't like the characteristics and didn't think we were going to get along. Horses for courses.