I need a good concealer to cover a red birthmark and dark circles under my eyes. I would prefer the same be for both areas. I have tried many and none really work so well. I am willing to spend whatever on this. Thanks!

MaxFactor do a good one. I think it's called ColourMatch. I know you said you'd like to use the same for both of them, but Touche Eclat by YSL is excellent for under the eyes. It reflects the light and brightens them a little. IT is quite expensive though. Also, I've found that when using concealer under the eyes it kind of 'cakes' and appears dark by the end of the day if you don't keep applying it. So I try to use a product now that reflects the light rather than 'covers things' up! Hope this helps :-)
Ps. I understand why you'd want to cover your birthmark, as we all feel differently about these things. But it's part of you, and it's what makes you beautiful! :-)

concealer from channel , dior , givenchy

trueblend by covergirl blends right into your skin
tip- pat the concealer on your wrist to warm it up. warming it up help prevent caking

trueblend by covergirl blends right into your skin
tip- pat the concealer on your wrist to warm it up. warming it up help prevent caking