Brahms Symphonies

So I've found Brahms to be my favorite Romantic composer lately, but I only owned Haitink's Symphony/Concertos/Etc. collection as far as his orchestral music is concerned. I also had Kleiber's 4th, which speaks for itself and doesn't need my approval. I recently got Chailly's and I like it very much, but I wanted to know where I should go from here. It needn't be a cycle, just give me your favorites of each of his 4 symphonies and/or renditions you think would complement the relatively crisp [...]