First of all - congratulations. Way to go landing a job so quickly in this economy. As others have said, don't think twice because of the money. However, you are asking how to make it sweeter for yourself while still staying within the company's limited negotiation stance:
- See if you can get more base paid vacation. My last 2 employers had given me an extra week.
- Incentives. See if you can structure a goal based bonus structure. Sounds like you are quite experienced and the economy will eventually get better. So you should be able to exceed your goals fairly easily aided by a recovery
- As it is a quality job, talk about instilling a Six Sigma type culture if they don't have it already. Link some bonus to making your company Six Sigma compliant in, say, 18 months.
- See if an ISO certification will help your company's business. If yes and they aren't already, that is another bonus oriented goal you may want to pursue