Man, you must be over the moon to get her back!!!!
After 3 weeks I guess you must have been feeling like it was gone for good, so congrats for getting it back, it is a pitty you didn't catch them first but hey Karma is a bitch and they will get theirs, just a shame you can't give your ROTTY another chance at them!
I do think it is a good idea to post up how they got away with your car, as you said you had a full security system on it, and they still took it.
I, like most other Skyline owners value my car much more than it's monitary value and would be very appreciative for any info on how to protect it more than just the mandatory alarm and immob.
oh well, great to hear you got it back in one piece!!!!