Looks like you have your bases pretty well covered there.
What will you be cutting with your new machine? Without knowing that, the only thing i'd suggest is that perhaps you might get a bigger 1/4" square end mill, and perhaps another ball nose cutter around 1/8" - usually, most roughing on these smaller machines is done with a square end mill, then move to a ball nose tool for finishing.
If you're cutting Aluminum or plastics, you might look for 2 flute cutters - very generally, the harder the material, the more flutes you'd have on your cutter. Also, the 10,000 rpm pulley kit is not a bad idea for the softer materials.