Buy the Decks you like! When I started collecting I had no idea there were "Valuable" decks I'd browse an ebay sellers listings and pick out the decks that caught my eye. So yeah, browse the 1eyed Jack website (I've bought many decks off of him.
There's also Aceking
http://www.acekingplayingcards.com/servlet/StoreFront Who I've also dealt with and his shipping is very reasonable, especially international.
I'm surprised you don't use Ellusionist as those guys kind of set the benchmark when it comes to custom decks.
So, browse the sites, pick out the decks you like, I know there's a lot of them these days, then when that parcel comes in the mail you'll get a great feeling of anticipation because you know that the decks inside are the ones that you've chosen rather than the ones someone has told you to chose.
Collect what you love, Love what you collect.