A linear switch (red) is going to be better for double tapping than tactile (brown), but the latter's bump isn't all that noticeable. I would buy a keyboard with both switches, try them out, and return the one you dislike.
one of my buddies has a Corsair with reds i'm trying to borrow. hopefully i get my hands on it soon to test.
I have been using both reds and browns for a long time, and I now tend to prefer browns.
The tactility is subtle, but it makes a difference.
With reds, you will tend to bottom out, simply because it's the only way to be sure you have reached the activation point. It's similar to rubber dome membrane keyboards, on which you need to bottom out to activate the switch, but without the tactility. It's very smooth, especially if you put O-rings or landing pads in your keyboard (which I recommend).
With browns, you can type lightly, "floating" over the keyboard and hardly ever bottom out. You feel the actuation point, which is at 2mm (half-way), so you don't need to go further. You can also bottom out if you prefer, but at least you have a choice of typing style. Not so with reds (or blacks).
If your typing style is "heavy", reds or blacks are probably for you, and browns will feel like gritty reds. If your typing style is light, browns are a good choice and the subtle tactile bump will help a lot.
For gaming, I think there is a consensus that red, black and brown switches are equally well suited, unless you already have a strong preference.
Blues for gaming are probably a bad choice, because the clicking mechanism (a moving part inside the switch) introduces a slight inertia that may slow down repeated taps.