I have specimens of all three. Apex, S&W Pro and DIY Burwell. Personally, I like the Apex Duty Kit trigger. It's a bit crisper and smoother than both IMHO. The Pro and DIY are close ( and dependant on how much TLC you put in.)
USMC, I'd check first to see if the factory will use their normal "Pro parts" or parts that will still give you the MA mandated 10# trigger.
hth

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Dave