My HBII and PRRI are a fantastic match. I'm sold on a British voiced speaker (alnico Celestion G10 Gold) in a Fender. They add the mids back in, compliments the HBII. Warm, chimey, rich harmonics, and endless sustain. I upgraded the PRRI with NOS tubes, G10 speaker, and an Allen TO20 output transformer. Yeah I drank the cool aid... ahhh.
What are you playing through?