Upload & Sell: On
alexpapa -- Yes, the 50/1.4 is definitely better than the 50/1.8. So if you like what you have, you'll probably like the 1.4 better. And for about 1/2 the price, you can get a 50/2.5 macro that is outstanding for image quality.
You'll want a wide angle lens/zoom with the full frame, so that's where a 24-70L or 24-105L comes in handy. The nice thing about the 24-105 is that you can leave it on your body and it will handle just about any photo opportunity you encounter.
You probably don't want to spend a fortune, so if you go with used gear, the 5D2 will be nearly 2,000 and the 24-105 about 800. A new 50/1.4 is around 400, a used 50 macro is about $250, and a used 24-70 is over 1000.
For me, I'd go for the 5D2, 70-200, 24-105 (or 24-70, its what I have), and 50 Macro.