I must have been lucky when setting up my system the way that I did. I chose the long wall to be my front wall as there are no windows behind it and I ended up about 8.5' from the front plane of the speakers which are 30" from the front wall (measured from front plane of baffle) with my head less than 1' from the back wall and I get all the bass I need, and then some.
I also found out that not all speakers had great bass. My last two choices were/are great concerning bass response. My old JBL 4319 monitors literally could shake and over load the room and my Atalante 3 monitors have almost the same effect.
Two speakers that I had from Decware were quite weak with the bass and the Tonian Labs speakers were okay as they revealed so much info that my mind could fill in the rest. I concur that moving them around (as much as a PITA that can be) could result in some happy and satisfying results.
All the best,
Nonoise