Actually the WR 250 R is a great bike.. very reliable and motor is good.
Just remember on a 250 4stk... you'll be reving it a little more than you buddies on the 450s.
bike's top speed will not be as fast but for just cruising the washes and in the more technical rocky sections a 250 is light and nimble. where it will lack a tad is the long road sections if you ever take them.
good accessories for the WR as well.. big tanks, taller softer seats, etc.
I'd say a good bike for a lighter person 170 and under.. if your bigger like me.. you'd be better off with a 450.
KTMs are good bikes too.. but a little more pricey.
though.. I'd never trust anyone recommending a bike with the bike name as a sig

could be a little slanted on the judgement
J/K dezertpilot