I am building up a Large 2012 Tic Tac Santa Cruz Chameleon Frame and need some help with figuring out the correct parts for it.

I currently have a cane creek 40 headset being installed with a pike 454. Wheels are roval with kenda nevegal 2.35 and brakes are Elixir 3. Seat post is a thomson. Not sure on handlebars or seat.

Crankset question- I am going with either XT or SLX 2x10 in a 175 arm and would like to know the best all around gear combo. I am thinking the 24-38 as a good middle of the road.

Any recommendations on cassette? I am going with slx shifters and derailleurs.

Thanks for looking and I appreciate all help