Enterprise. If you voted for it you obviously want to watch it.
I just picked it in order to see the poll results.
You can do that by clicking on "View results". There is no need to vote.
Whichever one you vote for, you're going to have to watch some dodgy episodes in the first 2 seasons, that may easily make you give up. But it gets much better.
Overall, I'd say watch both, but if I need to choose just one, depends on your taste. Can you tell me which Trek shows have you watched and which ones you liked the best?