I will second Olympus. I only have an E-300, but I have their prosumer 14mm-54mm glass and it is lovely. From the reviews I have read, it is very tough to beat for the price.
My first oly was an e-330. It was great on my trip but it got soaked a few times and it's not really made for that. I don't like the idea of not getting pictures of a place I may not be back to because of environmental conditions and the limitations of my camera's sealing, hence the e-3.
Olympus glass is very very sharp overall, and their lens features make sense throughout their various grades. I love that all the HG is splash/dustproof.
You should def look at the 50-200 SWF if you like telephoto, but be aware it begs to be paired with the EC-14. ^_^