It really depends on what type of magic you're into. There's such a larger variety of products on the market it is simply astounding. If your more of a Card Worker, Panic (sold here on Theory11) is a great effect. It is gimmicked but, gives limitless routining possibilities, once you know how to work it.
For Coins, if your just starting out get Bobo's Modern Coin Magic. It is THE place to start. Or, pick-up Factory Sealed or Bullet at Ellusionist, which are very powerful, and easy-to-master Coin in Bottle miracles.
And, if your looking for a bit of everything, I highly suggest The Real Secrets of Magic Vol.1 and 2 by David Stone. It shows you card, coins, ropes, bills, flash paper, and almost anything else you can think of. It also gives you great tips, and theory on Restaraunt working. Some of the most valuable pieces of magic I own.
Hopefully this gives you some ideas, if your still unsure check out the Product Review section.
-RA69