I've switched to going for Fedies (+20% Economy), with +7% PQ and +20% Economy lately.
With Economy so high, I find that I often MAKE money when maxed out production-wise in the early to mid games. All that money in lets me stay WAY ahead on all the tech I want... and keep up where I need to. I get all the Unique Goodies I want, except for Galactic Stock Exchange. The AI always beats me to it these days. One of my favorites too...
I used to be big into Technologists, but I find that economy bonuses let me research QUICKER then Research bonuses.
And with tons of money, I can buy my way out of trouble if I get a "bad" start and somehow fall down into the "you look like a minor to me" range to the AI. And then I can pop my Military Rating above theres and tell them "Remember that *loan* I gave you? Time for you to pay it back, with *interest*!".
Money, not diplomacy, seems to me to be the king in this game. With enough money, you can buy whatever diplomacy you want.