thanks for the reply
the reason why I decided to go with air cooler is that i wanted to save some space in my case (the meshify c by fractal design). I know that water cooler is still possible to use but if I mounted it on the front panel, it may reduce the space for the GPU.
I did see one build that uses a water cooler and lengthy GPU, and it didn't seem to leave a space between them. I dunno if that's a good thing or not. on the other hand, I'm also not too keen about installing the radiator on the top but that's just me.
forgot to add,
what about the other series? like R1 Ultimate?