I'm auditioning a BMI Eel Reference custom at the moment on my Rel sub and it's outstanding. A great value for the money, and I can only imagine what the Whale must be like. Deeper, tighter , beautifully open and involving,this Eel is an exceptional performer.Can't compare it to the super pricey stuff (out of my league right now) but I've tried a lot other in the $200-$400 range and this is my 1st choice for sure.Can't wait to get one on my transport. Good luck.