I always think Abraxas when I hear PRS! But +1 on the Crawlers, which are Abraxas-like, but with a bit more grunt.
That said, I find the idea of a MM-loaded PRS strangely appealing -- though that won't give you a terribly open sound! The Mule/MQ is also probably solid advice, but you could also go very open and stick a Stormy Monday in the bridge; I can kinda see a Stormy Monday set working here. :)