The grass isn't always greener... especially if you like the people you work with. Does it seem to you that the culture and the hours required to work are similar to what you have now? Obviously a pay raise is nice, but if you have to work more and will be more stressed and you can't have time to spend the extra money you are bringing in, what's the point? As someone that interviews engineers for a small engineering firm, I always question people that have bounced from job to job. Maybe I'm just old school and value loyalty and longevity. Unless it absolutely feels like the right decision to you, it sounds like you have a lot of negatives about the new job.
