Yes, I'd agree with that. My A1200T doesn't have any pci cards so there was no problem other than finding a tower box big enough for the motherboard. Its still a tight squeeze as it is so tall it goes up by the side of the CD drive space by the psu, so look carefully when deciding!
If you have pci cards maybe you had better buy a special box else the pci slots won't line up etc etc :-(
Good luck :-D