Actually, I don't understand or agree with that. The pistol in USPSA 3 gun is scored identical to a full pistol match. A good pistol is USPSA pistol matches is a good gun in 3 gun. Maybe the original poster meant with so many shots fired the pistol isn't nearly as important in 3 gun as it is in a pistol only match. Either way, points are points, I don't want to drop any if I can help it.
If you're buying a pistol for both, you're looking for a Limited class gun. STI is a great choice, see the rest of the thread for cheaper options. If you consider STI, make sure you budget for magazines.
I didn't explain my point well enough. Given his situation, I would think Jason should put money into a rifle next and "shoot what he gots" pistol-wise. My statement not to get hung-up on pistol is simply because, in my personal experience, its not where most of the points and/or time is won/lost in 3/multi-gun. Which, is not to say the pistol in unimportant in 3-gun. Just not as important as in a pistol only match .
Utimately it depends on your goals, Jason.
Well it seems I only have 2 choices with my current pistol selection: USP .40f (have to buy JF and 16 round mags) or USP .45f tactical (12 rounds of .45 acp).
I WANT to buy a USP .40 Expert anyways, so I was going to use that if I buy it...