Chris,
Have you thought about trying a crossover between your pre/amp? Thats the way i am going with the new YGA speakers and my JL Audio subs. You might try a cheap one from Marchand or someone and use your REL to cover the bass. (from where ever you Xover) Fairly cheap fix (no amp changes) and you still keep the best of the Harbeths and use the REL to your advantage.
Have you thought about trying a crossover between your pre/amp? Thats the way i am going with the new YGA speakers and my JL Audio subs. You might try a cheap one from Marchand or someone and use your REL to cover the bass. (from where ever you Xover) Fairly cheap fix (no amp changes) and you still keep the best of the Harbeths and use the REL to your advantage.