I'm not a graphics pro, but I will be doing some posters in my spare time. I have been using the GNU Image Manipulation Program (GIMP) on Ubuntu, but now I have a Macbook Pro and want to get a faster workflow. I'm looking at Apple Pages and Swift Publisher but this is what I really need from my software:
Fast page layout with bleeds / margins easily changeable
Colour correctness (What get's printed should match what I see)
CMYK support (GIMP does not do this well at the moment)
Layer management for manipulating components seperately
Clipart is not important - I've never found clipart that I would use.
Templates probably not important - I haven't seen any great templates out there.
I don't create art by hand so I don't need painting tools as such, although I found the effects in GIMP very good for creating.
The main issues I'm trying to eliminate are the mismatch of colors (I know I need to calibrate my monitor for this) as well as the time in making fundamental changes at the end - eg document size. This usually necessitates a complete restart in GIMP (at least with my skill-set, I'm not faulting GIMP).
I've attached samples of the kind of work I'm doing. Any advice is appreciated (regarding software choice or the work itself).