I agree completely.
Eventually over time I would add:
Geissele Dynamic trigger
Optic of choice
VTAC or similar 2 point sling
Free float rail
Flashlight of choice.
That's pretty much it. You would have one top notch carbine. In fact I have been running a fairly similar Colt since pre Y2k. It has been slowly reconfigured over the years.
This is in its current form.
Go with the Colt. Or an FN. Impossible to go wrong with either brand.