I'm in a similar situation to this at the moment. I have specialized domain knowledge and - I hate to say this, because it sounds so arrogant - I am the best en

I'm in a similar situation to this at the moment. I have specialized domain knowledge and - I hate to say this, because it sounds so arrogant - I am the best engineer in my company. And I hate that; in my previous job I was the worst, and I learned something every day from the skilled, generous colleagues I had. My prospects are limited here because my company won't commit to building a development team in SF. London (our other office) is a cheaper place to find developers, and it's been made clear that the preference is to hire people there. So if I stay I'm likely to be on my lonesome here for some time. I have some loyalty to my company because they sponsored my H1B and got me into the Bay Area (although they paid me about $30k under the market rate until I found out what it really was) but it only goes so far; today for the first time I replied to an email from a recruiter - we're talking tomorrow...