Thanks everybody!
Colin i was thinking of getting a sigma 18-35 f/1.8. Was looking also at the 16mm /2.8 from rokiyang

JA i have heard good things about the 300mm 2.8. Are those nuclear codes?

a 70-200 would also be good covering short tele (eg magellanic clouds) and up.
Annette I think the 500 and pico's are a bit tight for what i mainly want to do (nebulae) but i will have a go at galaxies sometime soon.Could come in handy! Cool scope though!
I was thinking of getting a shorttube 80 to get some extra magnification, possibly an ed refractor scope (80mm or something.)

