I would like to stick to GRUB since it seems to be more actively developed and the entries are automatically updated after a kernel update. However I love the look of the Burg themes (especially sora_clean).
Are there themes available for GRUB2 which have a similar look? I especially would like a "folded view", showing only one entry per OS (by default), and a the installed OSes being shown as symbols, instead of listed text.
I would also be grateful for installation instructions along with the theme suggestions.