Svengali decks are cool indeed. If I may offer a piece of (unasked for) advice, it’s better to master the techniques so as to be able to perform tricks and routines with your Bicycle deck, and to keep Svengali decks & the like as “rewards” for the good work you did.
What I mean is: nothing you can buy in a shop will ever replace a well-rehearsed technique. And the greatest stuff I have seen (and done) only needed stupid, simple Bicycles, or Bees, or whatever.

(But Svengali are cool…)

Hey im 16 and ive been doin magic for 9 years. as you sed if you learn the techniques you dnt need the svengali deck. i do the techniques. any of you heard of the black widow. amazing i got one i recomend it to anyone. check it out on here.

http://www.learn-real-magic.com/magic-tricks/close-up-magic/black-widow.htm