I've got my diy cnc router working quite nicely now. Its cutting mdf & wood only.

Currently it has a Makita laminate trimmer mounted on it, which is a nice router but doesn't have variable speed. I'm also using 2 different collets on it with 1/4" & 6mm bits.

What are the most common choices for a variable speed router/spindle these days?

As always with these things I want decent quality at a low(ish) price if possible.

The makita has a 60mm diameter body & is nice and lightweight - ideally the replacement should be quite similar in size....I don't want to mount a full size router on it.