[ShelledPants]

Safairland is much more secure than the RCS.

If you want the high speed setup, go for the 6004 SLS.

I do not like the upper shield and have removed them on previous holsters. Also make sure not to get the model with the thumb push button (after the regular thumb shield), as it can add precious time to a draw.

The regular thumb shield is excellent.

Best bet is to go to a store that sells Safariland and check them out in person (regardless of the pistol model) to check the styles out, and then order the same style for your model gun. http://www.rnicholls.com/ stocks Safariland in Toronto and has a storefront. Call them to ensure they have the holsters in stock for viewing.

EDIT: Lastly, depending on your brand of gun, you may have fitment issues with Safariland. I didn't have a problem with my TM 1911 in a 6004... but my TM 226E2 was tight. I had to remove the retention screw in the holster entirely. I like my 6004 to be completely loose without the shield in place, and it was hard to get the P226 to sit like that.