Suggestions to fine tune update_all?

I've just discovered the esistence of the "filter" option to add into downloader.ini cores and stuff to be excluded from the update all downloads and It's a great feature. I've successfully excluded all the computer cores and the consoles that I don't need/use with the "!". Also removed utility and "other" cores.

Now the dilemma: how to manage the arcade cores? I like some of the arcades, but I find the whole package to be overwhelming and causing me option paralysis. I'd like for example to keep the street fighters, how I'd do that?