Congrats on the M10/45 purchase…that was my first MG and wondered for months if I should have waited and saved for a ‘nicer’ MG. No regrets - it is a Powder Springs model, so has some history behind it. I skipped a Lage upper but added the Lage slim side-folding stock, finger groove grip with mag release, and extended safety - I personally love the high rate of fire with the factory upper. Aim at the belly button, squeeze off a One-Mississippi, keep everything in a torso target at 20 yards. I added a AC556 later for a rifle-caliber MG, and am glad to have two separate MGs instead of one nicer model.
Everyone has their own tastes - enjoy buying mags, ammo, and accessories for that M10 and savor the bullet hose it is!