A.M.
Try a book called Don't go to the Cosmetic Counter Without me (or the website). It outlines the best products over a variety of price ranges. I used to use only LaPrarie, things from Nordstrom etc. Now I use 5-10 dollar bottles and have seen no downgrade in my skin. For day, I use dove or oil of olay day cream with SPF. For night, I use oil of olay night cream (plain - not the red box kind).
Ps - also drinking lots of water is the best thing i have done for skin. I can tell by the way my face feels if I have drank enough water.
good luck