Woodworking Bench

Hello all. I am creating a workbench for my mitre saw, which doubles as an extended length workbench for woodworking.

The top of the bench has a surface which is 315cm long and approx. 60cm deep. The bit which goes between the slope and the longer side on the left is where the mitre saw sits flush.

I have already put the frame together and it is fairly sturdy (just a little bit of movement when I push it around in the same manner it would be when planing something. I am planning to put more supports in to minimise this.

I need to know what top to use on it. It needs to be pretty robust so that I can hammer things on it without worrying, but flat and straight enough to run wood through the mitre saw without worrying about it being level.

I would post pictures but conditions aren’t ideal in the garage at the moment to take photos.

I also need to know what wood to use for any faces and areas which I may use clamps on.

Finally, what wood is best used in vices?