I'm going to be practical and say J. Crew. Its the one line where I know the quality is decent and can I can get a classic/pretty suits, cocktail attire, casual clothes, swimwear and shoes.
J.Crew for me too, I always love their summer and winter collections equally and I agree with SFC that you could get the most selection! Higher End I would go for Ralph Lauren, not Polo the really good stuff!
catherine malandrino. i love her stuff, but i think j.crew would be fabulous. lately i've been really craving basics with knock out accessories and all the basics that i have that have lasted me years (since high school) are from j.crew.
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"i tell you one lesson I learned
If you want to be something in life, You ain't gonna get it unless, You give a little bit of sacrifice, Oohh, sometimes before you smile you got to cry.." -The Roots