I was a very heavy LX3 user for the last two years. I'd strongly advise spending a bit more and purchasing the LX5 because its a much better camera, especially in lower light conditions and absolutely worth the extra expense.
Two years later you will be able to sell your LX5 for a good amount... whereas the money you currently save buying an LX3 will be lost in the future when you wish to sell it... for by then the LX3 will be a really old-generation camera!
Do consider this future loss when you decide what's best for you in the long term.