I think Lasers are GREAT in a CCW handgun. But, you being a lefty really throws a monkey wrench in the works.
I have a Ruger LCP with a CT Laser on the trigger guard. Those sights on the LCP are so SMALL I can't even find them. But with that Laser this little pistol shoots light out.
I liked it so much I then put the same setup on my Glock 27. I thought I was a GOOD fast shot with the normal Nite Sights on my 27. But I improved in speed and accuracy with the CT Laser on the trigger guard.
So I decided one more try, I have the pistol grips CT laser on my Kimber Ultra CDP II .45 ACP, they are outstanding. They are not for everybody, but I LIKE EM. if you are hurt and laying on the ground, you don't have to extend your arm up to line up your sites, just put the red dot on the felon and pull the trigger.
Remember you can be in any position and still hit what you are aiming at. Even if your shooting arm was pinned, and you can still move your wrist you could theoretically get off the shot.
Another option is the new laserlite sight, it goes on the SIDE of the auto, it is neither on the grip or triggerguard. One touch of your index finger it turns on, touch again it turns off. What advantage you say? It will fit with any REGULAR Holster. Remember when you put a Laser sight on the trigger guard only certain holsters will work, very few actually. But when it is on the grip, back sights, or side, regular holsters work.
Also Crimson Trace are the most expensive, probably the best quality but sort of pricey, usually $175 to $250. The lasermax are cheaper, and the Laserlite goes for about $99 if my memory serves me correctly.
Hope this helps.
Regards PAH04