Welcome! I hope you enjoy your stay.
And I would suggest that you rent the TOS dvd's and get a well-rounded Trek experience.
I do love ENT better than the 24th Century Treks (TNG, DS9 & VOY) (though I am a huge TNG fan), more because of the "frontier-ness" of the show. I like that they make mistakes, that they're feeling their way around the universe and that they don't rely heavily on the computer. And I love the characters.
But TOS is all kinds of win in my book. It's as much "must see" as the rest of the series -- if not more, since it is the show that started it all!