Crown XLS 1500 with Yamaha PB-1 is my main rig these days. Love it. I generally have to cut the bass and boost the mids and highs though on the PB-1 though.
Bear in mind that on the PB-1 the Treble-Mids-Bass controls are approximately set at 2-10-2 when flat. So you're basically just boosting the highs. Plus you have the parametric Mids control.
I took my PB1+XLS1000 on a gig with my Aguilar DB750. Fingerstyle they were about dead even. Slapping really drew out the differences between the two. I kept the Yamaha+Crown and sold the DB750. Great amp but I got what I wanted out of the pre-power amp setup.
The Yamaha PB-1 is heavier than my Pope preamp or XLS1500 amp. Built like a tank.