Electric start, ridiculous (good) over-cooling capacity, easy to perform external mods which improve power and economy, failure modes well-known and generally can be managed beforehand, easy to add fuel range.
ALOT more fun than all the others you've owned, even off-road.
The KTM 690 is fantastic, stupid, "throw me in jail or take my license" fun.
The KTM 640 is . . . a well-known and highly respected paint shaker. Make sure any dental fillings have been freshly re-secured.
The XR650R is . . . a bike which receives lots of praise for it's durability and toughness but . . . just try starting one that stalls in the heat. You'll never forget that nor will your heel.
Husky TE630 and others are likely all out of your price range.
I always vote fun over pure reliability. It's a HOLIDAY (!), not a campaign.
Orange, it's the new black.