Theres some good advice here, forget GA if you want to earn some money, if your starting out choose avionics, there is a shortage, you'll have to get into an airline to get the right types, and then the world is your 'lobster' as they say.
If you want job security and perks stick with a permanent job with a big airline, but if you want loads of cash consider contracting, it might not suit everybody but you can easily make twice as much as you did in your old permie job, I certainly did.
Somefokker and Cones, do I know either of you? did you come through the 'Academy' (Aer Lingus apprenticeship)