I just recently transitioned from Pad to stick, and now I swear by it. I mean a pad is good, but with a stick you really just become a faster, more concentrated and better all around player. You will notice once you are used to it and supers come off alot easier. Well for me anyways, it is really more of a preference thing.
I bought the Soul Calibur 2 Hori stick, which resembles the DC agetec, but a little smaller.
You can get it off of http://us.yesasia.com/en/PrdDept.as.../section-games/,
It is $50 and free shipping! It got to me in about 10 days. A very good stick.
The only downside about it: The buttons are mapped really weird because it is for Soul Cailbur 2. So you have to get only certain types of controller converters if you plan to use it on DC. You also have to change around buttons alot, which really isn’t that big of a deal.
Also, X-Arcade sticks from what I have come to understand are terrible. Pelican as I have been told just does not make good sticks. I have used 1 and it really just feels awkward.