Nikon D90 or Panasonic Lumix GF-1

I'm torn between a DSLR (Nikon D90) and something kind of sleeker and cooler, like the Panasonic Lumix GF-1. I really like the looks of the latter, though it's a bit spendy for what you get. Biggest worry about the Nikon is that I'd not use it as much because it's so big and bulky. Lumix comes highly rated and people who own it love it. Considered a great street camera. What are your thoughts?

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