Hi Gav, I agree with Leon, with a field that wide there will be plenty of stars.
A bit of colour correction & you have a lovely Triffid there. You could always tighten your stars slightly if you think they're too overpowering.
Alternatively you could crop the image a bit to make M20 more prominent or perhaps even squeeze the Lagoon in to share the space(no pun intended
). Just my two bobs worth.
Cheers,
Antonio