I agree:
My theory:
Those who learn (or can) shoot pistols accurately and well, will easy learn to use and shoot rifle.
But it doesnt work other way around.
Pistol is the hardest discipline in sport shooting.
Not only do I find it the hardest to master, it is also the faster to deteriorate.
Lot of good info on the subject, the only thing I feel I can really add...I have read mention of some pistols not as safe because they don't have a "true safety" I would argue, your finger is your safety. Don't put your finger on the trigger until you are ready to fire, same as with a rifle.
Nothing wrong with the pistol you are thinking about. I would offer this up. Pistols with thumb and/or beaver tail safety require a lot of reputation to become proficient. I know you said this is a comp gun. I would venture to say if something went bump in the night, you are more than likely to reach for it. Just looking at the bigger picture.
Other than that, spend the money going to a good instructor and ammo. You will be surprised how much people (accomplished shooters) forget what got them to a high level of shooting. A good instructor can look at your target and tell you what you are doing wrong and what to do to correct it.
Enjoy your quest.