Norgren
16-004-003 is a little lighter than the usual 16-004-011, but also allows you to omit a brass fitting (if you're using the new compressor). Likely not worth worrying over though. You can also get smaller pressure gauges that should be a little lighter, if you're really trying to save a little weight/space. I also like Clippard
TV-2SP for the dump valve but I'm not sure if it saves any weight as I don't have one handy...