I'm working on expanding and filling some gaps in my makeup kit, and I would like to know some of your personal favorites when it comes to the following:

-Concealer palettes
-Cream foundation palettes
-Lipstick palettes
-Synthetic brushes
-Fast drying daily brush cleaner

Thanks!

RCMA foundation palettes are awesome and I recently started using Cinema Secrets quick drying brush cleaner.  Not sure about the other stuff.

RCMA Foundation Palettes (my favorite)
Ben Nye Conceal All Wheel

I've heard good things about Graftobian's lipstick palette. 

I will say that if you have the items to make your own lip palette, then you could go that route (provided you have enough lipsticks in a wide range of colors).  I have like a million lipsticks, so I chose 24 colors out of my stash to make my own palette.  I sanitized them with alcohol, melted them down, poured them into an empty palette and voila!

-Concealer palettes: Ben Nye is pretty good. I also really love the YSL Touche Eclat concealers but they're super pricey.

-Cream foundation palettes: Don't really care much for cream foundations personally. I like Make Up For Ever's HD foundation. Yes, I'm aware carrying a ton of bottles isn't exactly travel friendly, but the formula is incredible.

-Synthetic brushes: Japonesque, Too Faced, Sephora

-Fast drying daily brush cleaner: Japonesque Brush Cleanser! And their solid brush cleanser for daily 'deep' cleans.