What camera should I buy?

I have a Panasonic Lumix DMC LX3 – it’s a great little camera, but I feel I’m laking a really good optical zoom.I still want a small camera – I’ll never take a big one out, so I was looking at the Sony Nex-5 with the super zoom lens, but it’s not cheap… Does anyone have any suggestions for a decent four thirds? Or has anyone tried the Nex-5