That looks pretty good. My BFe has loads of clearance so I'm sure that it'd take bigger wheels easily. There's not a huge amount of difference between a 650b wheel and a 26er so I doubt the affect on the geometry is too great.
A chap who sometimes rides with us has the Solaris and throws it around pretty easily and is super quick on it.
2015 Stanton Ti Switchback
2006 Specialized Demo 8
2013 Specialized Allez Sport
1999 Santa Cruz Chameleon
1994 Cannnondale Beast of the East (rebuild still in progress)