<human>: Can you succinctly summarize the text in 1-3 sentences?

I've been working in total for about 2 years since graduating college in 2009 (thanks, Recession). I've been at my current job for just over a year, and last week I was contacted about a new position with a different company. I like my current job, I have no complaints at all. My boss and owner are great, I'm good at what I do, make good enough money ($40,000+ when adding in bonuses), and have not in any way been actively looking for a new job.

After listening to what the other job has to offer, I'm seriously considering switching. This new position would pay me north of $60,000, give me a lot more freedom (work from home, travel around New England), and has a lot more growth potential. I am one of 2 finalists for this position and have been asked to go to California to interview. I currently live and work in Boston, though, and would have to take time off from work to go to this interview.

I don't want to burn any bridges with my current company. It's a small business, they really are great people who are good at what they do and have built a strong company from the ground up. At the same time, its irresponsible for me to turn down a position that is a clear step up career wise. 

What is the best way to approach this so that I can go on the interview without upsetting my current employers?
<bot>: Was asked to interview for new job, currently employed, don't want to piss off my boss. How do I handle this?