Well my intentions for a while have been to pick up a couple SX 15s. After reading what I just read I'm not so sure. I've researched the Avalanche a lot and I'm just not convinced. Some of the other forums (automotiveforums.com for example) really push REs products and have nothing but good things to say about the SX. AA gets a lot of attention as well but I've never heard anything about the Avalanche that would make me choose it over the SX. Granted they do used Adires XBL2 technology. I understood the SX to be fairly good on the SQ as well as well as rattling your neighbors house. If the Avalanche offers better SQ and I pick them up will I still get the TL numbers and low end that I am looking for? Also, what kind of enclosure space to port 2 15s? I drive a Grand Prix. Have about 13 cubes to give up. Thanks for any replies.