Help, I am seriously decorating challenged, need advice please! Any thoughts on what type of frame would look good?

The master bath of our new home is the one area I am going more modern/transitional and trying to make this room our happy place. Different from our usual traditional safe stuff.

There is a lot of warm greys in the tiles of the bathroom. The vanities are a dark mahogany with the counters a marble like quartz. Brushed nickel fixtures. Walls are white at the moment (couldn't decide before painter had to get in there). There is a big window so lots of light and a freestanding white tub.

I am trying to pick out framed mirrors for the two vanities. Do I go more modern and clean like just a mirrored edge? Do I go wood and try and match the vanity stain? Or do I go really different, like tie in to the greys but instead of clean and modern throw in some barn wood or something? Ack....no clue here.

TIA!

Our tile selection:

VERY similar bathroom (I think those are even our faucets in chrome)