For comics you really need a tablet, unless they're all in black and white. Even then you'd need a large e-ink reader to make sure reading them doesn't get really annoying, really fast.
If I were you, and had the cash, I'd get both an ereader and a 10" tablet. Other than size, which really needs to be 10", any tablet will do perfectly fine for reading comics. Any current internal specs will be sufficient and a resolution of 1280x800 is perfectly fine.
You ought to be able to pick up a Galaxy Tab 2 10.1 for cheap right around now, given that the Tab 3 has been announced. I've got the Tab 2 myself and find it perfect for comics. In fact, I can't really see how the higher resolution of the Nexus 10 or the last iPad could improve the experience more than very marginally.
Last edited by Istvan diVega; 06-28-2013 at 06:10 PM.