i have owned 3/2s, 5.1s, and now 6s. 2 things i have learned about watt/puppy bass. first, get all the power you can; i now have levinson #33 monoblocks and the additional control transformed the 6s. second, the woofers on the puppy's are greatly affected with speaker height. don't be afraid to fully extend your puppy paws to reduce room interaction. i can't remember the spike arrangement on the 3/2s but experiment with height and your bass will tighten up. as far as the tweeters, the 5.1 tweeter was better for me than the 3. good luck.