Hi there and welcome.
Yeah you can't beat the iconic white armour whether it be original trilogy TK or TFA.
There are quite a few TKs to choose from so have a look over Costume Reference Library (CRL) and pick one that you are passionate about.
http://databank.501st.com/databank/Costuming:FISD_CRL
Once you have decided jump on over to the detachment to do all your research, you can never do enough research. There you will also find the list of vetted sellers for the armour.
http://www.whitearmor.net/forum/
While you are reading and researching have a read of this thread to give you an idea on how the approval process works.
http://www.501st.com.au/forum/showthread.php?tid=6720
If in doubt always ask.
Have fun and enjoy your time here!
Welcome to the forums. The more you read the more money you'll save!!
Another comic con recruit. You guys have seriously inspired a lot of people. Welcome!