Actually, I just bought ann X-Dreamer II myself. Talk about coincidence
I just got fed up with cheap little e-Mecca case. Anyway, I did some eyeballing yesterday when I finally had 5 minutes of free time.
Its wider than the e-Mecca so I could probably cut hole out the bottom again. Don't want to do that again unless I wanna cut holes in my desk too. There wasn't enough airflow. Then I figured I could fit it on the side panel without a window. Theres just enought space to keep it there but the fans (or the rad) would have to be sticking out of the case. The outh option like you said is putting it on top. I'm probably gonna end up cutting hole in the top too. If I do that, I'm gonna have to get a new pump & res because rith now, that has to be the highest part of the sysem... I designed sort of like Thermaltake's but but it pumps 270Gal/h. On top of that I sould have to put an HD blower in the top bay to let some cooler air pass through it.
Another option is going with dual Black Ice Micros or a Black Ice Micro II.
Hope yours turns out good too.