Great question - something I'm currently grappling with myself. It's a tough choice and i'm leaning towards going solo but the offers keep coming through the roof - almost like the devil trying to lure you! To me it's the learning curve that comes with entrepreneurship.
Growing deeper vertically is great, but growing horizontally doesn't happen as much when you specialize - and that's what I'm looking for atm. With an insurance of three dozen job options - it's not a bad idea to make the jump I think!