Same with SpinyNorman, I changed the springs on my 75B/O which made a huge difference. With some light polishing, this all resulted in DA being 8 lbs and SA a crisp 3 lbs.
As for my P-07, I polished the internals to hasten the break-in effect; DA is now 8.5 lbs and SAis 3.25 lbs. Also change the recoil spring to CGW's 15# RS, making it easier to rack the slide and fully cycle each round reliably (the factory RS was too heavy for some ammo I was using).
Edit: Forgot to mention that the DA trigger on my P-07 was a bit gritty out of the box. It improved immensely w/ the polishing (followed schmeky's post here:
http://www.czfirearms.us/index.php?topic=66147). The 75B Omega had a smoother DA out of the box, so it didn't require as much polishing, but I replaced the springs on it (CGW's SPGK1) to come close to the P-07 which is still using the stock springs (hammer, firing pin, firing pin block plunger).