Personally I'd suggest Premake because it uses Lua instead of rolling its own scripting language. The world would be a better place if we could all agree on one scripting language for stuff like this so no one has to look up the syntax for things like creating arrays for every individual tool.

Feature-wise premake isn't entirely caught up to CMake but it has everything important. Also the premake files look a lot cleaner and more readable compared to cmake files.