CNC Tooling / Drill Head for cabinet boxes

I am working on getting my cnc machine setup for my shop and hoping to get some input on suggested tooling to start out with. I will mostly be using it to cut cabinet box parts. Here is what I have so far

3/8 and 1/4 Compression for general cutting

1/4,3/8, 1/2 downshears for dados

My machine has a 4 bit drill head- should I run them all as 5mm for shelf pins or will I likely need a 3mm or 8mm bit for pilot holes?

Anyone have a source for bits they are partial to?

Thanks for any input!