Armycook, based on your description and my experience with classic minis, you want a Jap Spec SPI. That's the "Easy Button".
I think the SPI mini is the best compromise for a 20+ year old car and modern functionality, sound deadening, daily driver and distance practicality, but still a unique hobby car you can make improvements to handling and suspension and has the classic mini ride. It also has the benefit of being able to convert over to carbureted and points driven ignition if something goes t!ts up and replacement injection parts are not available.
Unfortunately, we cannot get one here in CA without an engine swap into an older car. If you are going to go the engine swap route of putting an SPI drivetrain into a classic (which I am considering doing with a Riley Elf I have), it will probably be not a whole lot more work to do a D-series swap with a kit that someone else has already properly developed.
That said, I'm not convinced that some of the mass-marketers of the honda mini kits properly developed them. They make it sound easy, they put together a nice kit and tell you there's lots of help and experience out there, but there is still a LOT of fabrication work involved. To test my theory, find out what the "All-inclusive Kit" price is, then ask them the "fully installed, turn-key pick it up in XYZ and drive home 1500mi away" price is. Take that price difference and divide it by 100. That's roughly how many hours it will take this EXPERIENCED shop to do the swap and stand behind their work.
Lately, I've had my own prior biases against some cars be softened and I have been presently surprised. While we've had some MINIs before (05 cvt vert, 02 S with lots of mods, 05 JustaCooper, 12 Countryman S), my wife's current daily, an 05 S w/ 160K mi on it is by far the most fun MINI I've ever driven and enlivens the little bubble of giddiness I get when I drive well-sorted classic minis. I've always said it isn't fair to compare the mini to the MINI, but with this 05 car, I get why people do it. Hopping in this thing, you'd NEVER believe it were 10-11 years old and at 160K miles.
The other car that also gave me pause and new found respect: an NA miata (in my case, a 1994 base model w/ 135K on the clock). Nimble, slightly underpowered in the seat-of-the-pants department, but seems to react about like a high powered 998 of warmed over 1275 would respond.
My advice: Go to a new or used car dealership on a nice day and go test drive some MINIs just to give yourself a baseline. I know, it's not a classic. But go for the "drive a bunch of cars for free" and then question what you want and why you want it. Having a classic car that is a reliable daily driver is along the lines of a high schooler wanting to be a professional athlete. Pretty common. Not out-of-the-question. Lots of crushed dreams along the way. A very select few ever achieve their dream. And those who succeed are always very gifted/skilled in the area of their want, very dedicated and perhaps singularly focused, and often times have connections to get their foot in the door.
Congrats on your sale and good luck achieving your dream.