Hey. I was dealing with this "issue" recently. I would link you to my other post, but honestly...typing is quicker.
Basically, I got fed up with Studio Fix powder and NEEDED something new. I opted for the NARS powder foundation, based upon the raving reviews of their liquid.
Here's the verdict: Very, very powdery. As in...I swear more ended up on my clothes and in my house than on my face. It seemed like a big waste. Also, the coverage was not quite as full as I would have liked. I had to pack it on (remember, I'm losing a lot in the process) in order to get a medium-full coverage look. It DID hold up exceptionally well throughout the day, which was a biggie to me. I live in Phoenix and it's hot and I shine, but the NARS kinda kept that at bay.
My issue, then, came down to how much was required to get the coverage I wanted along with how much was being wasted (I'm serious...as far as a pressed foundation powder goes, it was freaking insane). And I figured that within a month I'd have to repurchase. Due to the cost ($45 new and $35 for a refill), that seems like a ton to be spending monthly on foundation alone.
So I did a little more research via makeupalley, totalbeauty and a couple of other sites and decided to try out the Laura Mercier powder foundation.
So far so good. Coverage is fuller, though it still doesn't look heavy or caked-on. I need to blot 1-2 times a day, but it's not extreme to the point it was with the Studio Fix. Color is very natural, powder seems to be highly pigmented, and best of all, I'm not losing half of it in the process.
I am REALLY big on using a brush to apply foundation powder, reserving the puff/sponge for touch-ups, so I can really only comment as far as that's concerned. But I like this Laura Mercier a lot so far.
If I end up with any monstrous breakouts in the next couple of months, though, I'll let you know.