Enzo:
You have to understand that the folks on the forums know a little something about magic. We've all gone through the phase of wanting to and/or getting lots of new material and learning all the secrets. As a beginner in magic, it is fascinating. Especially when we get good reactions when we quickly learn and performing tricks. From your perspective, you want to explore all different areas of magic and perform all different types of effects. We've all experienced that at some point.
Then most beginners discover something. They know a lot of secrets (and feel let down by quite a few of them), they can perform (but haven't mastered) a couple of tricks and their our audience doesn't seem to react the way they want them to. At that point the magician does two things... they stick the DVDs and decks on a shelf and move on to another "new" hobby or they realize that the magic isn't in the effect but in how the magician presents the effect. Reread what is in italics. Think about it for a minute.
The first implication of that is that your time is better spent perfecting the presentation of the effects you have, rather than buying more effects. Buying too many effects at once generally results in you rushing through learning the effects and then performing them before you are really ready.
The second implication is that there is no "BEST" effect in any category. There may be a best effect for what you want to do, but answering that question requires a lot more information about your skills, your abilities and what you want to do. Yigal Mesika's Haunted Pack using the Tarantula is great because you can put the deck on the floor and perform the effect. Angelo Carbone's T.I.D.L.E. (Totally Impromptu Deck Levitation Effect) is amazing and can use a borrowed deck but requires hours and hours of practice to do the effect and requires you to control your spectators so that they aren't watching from bad angles. What is best for me isn't necessarily best for you.
My final thought is that real magic doesn't exist. Too often our search for new material is the search for real magic. Something that has a method that really does the impossible. We know its not out there, but we are really looking for the effect that has no downsides. No gimmicks, no tricky sleight of hand, no problems with angles, no preset, no clean-up, fully examinable, totally impromptu using borrowed objects that completely amazes. It doesn't exist. Every effect, every method has tradeoffs. We see something performed and we are amazed but that amazement fades as soon as we learn the method... we watch the trailer again and think to ourselves - oh man, that is soooo obvious. The challenge for a magician is to recreate the experience we had when we first saw the trailer for the spectators -- that is what they see, not the method.