For desktop I would say SUSE is the way to go. You can get different levels of support. Much more worth it than Windows license - which is the price you pay to get Microsoft stickers on your machine (and to have their spyware on). Calling MS support was the worst experience ever for me. You shouldn't really use RHEL as a desktop OS (they even dropped KDE recently). On servers if you have the money RHEL is the best you can get.