My choice is Corel's PhotoPaint. I find the user interface cleaner (always annoyed at having to move those pallet things cause what I want is under them), the printer interface has more versatility (dynamic temporary resample to size in the print preview), more tools for pressure/angle sensitive wacom (it's a way of life!) and better access to on the fly brush alterations. And I have yet to find an effects filter that won't function. Personal opinion!

Pass no temptation lightly by, for one never knows when it may pass again!