James,In general Olga's right but one 'quick' move isn't going to affect things too much. If you've got a firm offer from the niche place and you want to do it then do. Be sure about your reasons and think about what you'd say to a future employer .. not some 'this is what they want to hear' answer but the truth.. if you're genuinely happy with what you'd say then go for it. Also, if you stuck with your current job, how would you feel in one year's time?..