I am a cheapo with modern/mid-century modern furniture sensibilities. My house is as barren as my womb (j/k...I think...also, that was probably TMI...) and West Elm has helped me tremendously in filling it out. They have some nice, trendy stuff along the lines of IKEA -- but with better quality.
The best time to go is during the floor sample sales where I've scored tables, chairs, and accessories at 50-75%. They also have sales on in-stock stuff regularly, just be on the lookout.
Also, if you get the credit card, you'll get design dollars for every dollar you spend. Thus, if you spend $250, you'll get a gift card in the mail for $25. Or, if you spend over $750, you can get no interest for 12 months. A good bet for those in need of mass quantities of furniture. Like me!