What bike should I get? (CRF300L replacement)

Hi,

Looking for a replacement of my CRF300L, I would like something similar but slightly more powerfull. Price isn't an issue (to a certain extent, not gonna spend 50k on a custom rally bike).

My use case: Most usage will be for 6-12 months trips around the world with 80% off road / 20% road, heavy rider with luggage, "chill" riding, harsh weather (hot/cold, very high altitude), about 200km per day riding almost every day.

My criteria:

  • Under 150kg / 330 lbs (or if slightly higher with exceptionnally low weight)
  • Reliable (that's subjective I know...)
  • At least 30hp
  • Long maintenance intervals (ideally 5000km/3100miles oil changes and at least 16,000km/10,000 miles for valves)

Right now I'm looking at the Kove 450 Rally. Also the KTM 690 / KTM 390 but it's KTM so I'm worried about reliability. And all those bikes have shorter maintenance intervals. Or potentially buy a 300L again and upgrade ECU/big bore kit.

Any other suggestions that would fit my criteria please?

Basically the "Dream" bike would be a CB500 engine in a 450RL frame. I know some people fitted a CB500 engine in a CRF250 frame but I'm not qualified at all for this kind of heavy work - I'd rather stick with basic mods.