I agree with others, but thought it might help you (Sean) to have a bit of background as to why.
Angelfish available in stores will be some variety developed from the species Pterophyllum scalare. There are two other species, but those will be wild caught if they are available at all, or bred by an aquarist locally. P. scalare attains 6 inches in body length, and has a vertical fin span of 8+ inches. So as you can see, they need space.
You also asked about two. This almost never works unless the two are a mated male/female pair. Angelfish are shoaling fish that live in small groups, and they develop an hierarchy or pecking order within the group. Except for a breeding pair, they should be in groups of five or more; in smaller numbers there is a very good chance that someone will get picked on, and this always results in a highly stressed and sick fish, and frequently death.
Hope this helps.
Byron.