Hello Lila!
I don't use liquid foundation but I am uber picky about what foundation I use. I had been using Bare Minerals (I have oily/dry combination skin) and it was great, but not doing what I really wanted.
My esthetician (sp?) recommended Jane Iredale makeup and seriously...I will NEVER go back to anything else. It is absolutely A-Mazing!
It is the only medical makeup there is, and has actually changed my skin...and I've only been using it for 3 weeks! you can go to www.janeiredale.com and click on "where to buy" and it will give you a list of all the local places that sell it. It also has the benefits and other information about it as well.
I use the mineral loose powder foundation, and that runs me about $45 dollars, but it also lasts me for 3-4 months...so fairly cheap in the long run.
Hope this helps!!!