Haven't had Delta enough to offer an opinion. Nathan gave me a lot of IPAs last time I saw him; not sure I remember that one clearly. I think I'll be trying some again next week, so maybe I'll know better then.
If I had to use Galaxy in a blend, I'd try it with Cascade first. The Australians use a lot of Cascades in their pale ales, so I think it would be fitting. I'd be afraid of blowing out some of the interesting fruit characteristics with a lot of strong citrus and pine.
I'm going to use Galaxy for the first time this weekend, so l'll probably have a better opinion on what would go with it then.