Nice review. You have my interest. What exactly did you put these in? No idea what an X7 is. Will these fit any other equipment?
Thanks

I use them in Creative Sound Blaster X7
http://en.europe.creative.com/p/sound-blaster/sound-blaster-x7

They are much larger than regular op-amps and require around 1cm of clearance around and about 1.5cm above the slot. Should fit other equipment as long as the slots aren't right next to each other, or other components.