Well a Gig is going to be one of the hardest to keep. Honestly saying.
The issue I have, with dealing with the gig, is having the canister filter.
You have dealt with the canister filter for quite a while and you know what to do and not to do. The bigest problem with canister is the build up of detrius and basically a nitrate factory. This constant flux, cleaning out every XXX days/weeks, causes a lot of flux. Even in the bacteria that is growing on the media in it.
Frankly before you move to a gig I would upgrade your filtration to a sump, does not have to be large, then move forward.
While some people say that a canister is a mini sump, it is in the eyes of the beholder. A canister can have more surface area than a comparable sump could hands down, but in the long run one flush of the media and a mini cycle starts.
Just my two cents on the issue.