If soldering isn’t your thing, you might want to go with the BUSA Camel instead of the MR kit. It’s easier to work with and less fiddly, which might save you some headaches. I had a similar issue with a detailed kit a while back, and switching to a simpler version made a big difference for me.
For the DR1, I’ve heard the BUSA kit’s ground handling can be a bit tricky, so just be prepared for that. As for SE5s, there are tons of options out there, so you’ll find something that fits your needs.
The DH2 and M1 are cool, but they’re a bit of a logistical nightmare for storage and transport. I’ve had my fair share of struggles with those kinds of models. Pups are similar to SE5s in terms of options, so just check out reviews for the best one. I haven’t seen any Eindeckers in 1/4 scale, so they might be hard to find.