I agree with getting what you're more fond of, especially if price is not a factor. Like Mr. Misha said, cinnamons are a pretty base morph and aren't very hard to find (maybe compared to a pastel, which is probably the most common morph).

Are you planning on breeding? If not, get what looks nice to you. If yes, then check out some of the pastel combos and cinnamon combos and see what you like best. What male do you have/are you planning on getting? If you already have one, check out what it'd look like if you paired them. I don't recommend just jumping into it and buying one or the other if you're not particularly taken with either--there will be others.