I'm not an LEM fan. Tried them & didn't care for them. I guess I'm SA/ DA sort of guy. Been shooting this trigger for 40 years. Not a fan of cocked & locked ~ seen too many negligent discharges. The V3 P30 with no safety was my choice. Since the only way the gun will fire is by pulling the trigger due to the firing pin block, it's as safe as a gun with a safety. Only difference is you don't have to fool around with a safety. Just pull the trigger and bang. Simple, easy. An old friend (retired FBI & US Customs) carried a S&W M 59 with the safety OFF because he didn't like the chance of forgetting to take it off under fire. HE was glad that the new Sig he got had no manual safety. When he went to US Customs, they issued him a Glock & he learned all of it's quirks. He now has a G19 in OD green he loves.
If you don't need to add anything to the mix to add a step (manual safety) when it's not needed is to slow you down.
As far as the P30 / P30L? I got a straight P30, V3. The P30L has a longer sight radius and a 1/4 " longer barrel that will give up to 50 fps more velocity. That's the pro.
Con: Try to find a variety of holsters. There are very few to chose from. The gun is heavier and more difficult to carry or conceal. Is the extra length that important to you? I would think that it would be a hindrance. If you look at Sig pistols, they sell lots of P226 pistols. But a far better pistol was the original P228, a smaller version of the 226. Wish I had an original.
My opinion ~ from an old, treacherous guy.