I'm no expert, but the 510 seems to me like a race bike and I thought I read that the oil change intervals were 300-500 miles?
The DRZ would be pretty low on power i think compared to your 450, but requires much less maint. than the race bike 510, i think....lol.
Mate you're the one on crack. Do your research. Like i said, Husqvarna make a race ready SM why would you buy a 450SMR to take the lights off it and deck it out for racing when you can buy this>>>Are you high? The 610 yeah is meant as a road bike, but the 450/510 are race bikes with lights and mirrors, and the maintanence schedule to go with it.
I know all about maintanence I own a KTM remember. Plus It happens to be my personal OPINION is the 610 is ugly. But the funny thing is when I looked at insurance between the Husky and the ZUK the DRZ was almost $25.00 more a month than the Husky.