Ack. You're probably one of them.
I can't really say I recommend the GM Custom kit. It's an old kit, and the quality shows. It's not entirely well detailed or accurate either. After seeing the BEE-Craft lineart in the manual, I promise you will want to chuck the kit's internal frame out the window.
Get the MG Aile Strike instead, if you don't mind the design.
As far as a representation of the GM Custom goes, the MSiA would be better.
Same goes to you. BTW I`m planing to get the MG Strike, I already ordred the HG version.