So, with the SMS-1 I now have a great deal of control over the crossover between my mains and my subwoofer -- much more so than I have on my receiver. The SMS-1 allows me to adjust crossover with more options, with additional slopes, etc.

Is there any reason I should use the LFE out on my reciever, when I can instead set my mains to 'Large' and have the SMS-1 cover the bass management?