I like my Eclipse amp also, it's an older one that is made in teh USA and is rated 75x2 but when at 12V so it's underrated, since it puts out more at 14.4V which is where many amps are rated at.
It makes my DLS pound in my doors you can even feel the thump in your chest, it vibrates the piss out of them, I used a ton of matting 1/2 roll of RAAMAT on each door + ensolite foam, and 3 layers of matt and ensolite foam behind the speaker, I also covered the majority of the Door Skin itself with RAAMAT and ended up making some foam rings for the door clips because there was enough midbass to make the clips themselves rattle.
I can't even imagine the vibrations you would get from XXX those are supposed to be awesome mids!
My Advice to you if your having rattles is spend the time matting and sealing up the doors, it also increases midbass response.
The older eclipse are rated a little more conservative than the new ones, but IU'm sure the new ones have good SQ and very little problems. Eclipse makes some good stuff. I don't think the new ones are rated at 12V I have to wonder if mine is similar to the 100x2. If I buy another amp it is going to be a DLS A3 Twin Mono 100x2 or up to over 1000 RMS Bridged @ 1 ohm with a huge daming factor. It requires 2 4ga power and 2 4ga ground for ultimate SQ and seperation and is a class AB amp.
http://www.infinitecaraudio.com/cgi-...l&catalogno=A3
it is a bit larger though!
Too bad you don't live around here I would love to hear some focals utopia or kp2's installed in a titan since your imaging would be about the same. Glad your happy with them!