Yes, I agree it's hard to match strings up. The best way to find a good string for you is to try several. Choose one, play it for a while, and decide whether you like it. You can try others too - maybe you'll like more than one, or find some better for certain music.
Personally I only use fluorocarbons for all my strings, but that's because I like the way they feel and my Flea has a plastic fretboard where wound strings aren't recommended.
Hope you find a low G that works well for you and sounds great!