Did you cover the mounting holes at all?? If you didn't, did you have any issues screwing in the mounts?
The top was a pain to take off. There were 2 phillips head screws, and 4 tabs you had to push. It was tricky, because you have to tilt it towards the front of the case, because the tabs at the front of the case are turned 90* from the other ones.
My favorite part of building a comp is the building process. I love taking things apart and putting them back together, so I had a blast when I built my pc. It was also fun getting all the wires routed nicely, a challenging feat with my antec 900.
But I do agree with you that overclocking is a lot of fun, I think I gained about 5,000 points in 3DMark06 after I OC'd everything.