Since I've been getting more and more into mentalism, rather than answer your question directly, I will demonstrate by predicting the responses you'll get to this query:
"You won't like the answer, but the performer makes the effect great or not, not the material in and of itself"
Both parts are true. Most people don't like the answer the first time they see it, but it is true, and it is what you'll hear. They'll tell you this not to discourage you but to encourage you to realize that small effects can be great miracles when properly presented
I've seen some of the simplest effects turn out amazing when in the proper hands, and some of the best effects turn into bombs due to poor presentation.
Take the torn and restored newspaper - I'm sure everyone has seen some pretty poor presentations (try youtube if you've been fortunate enough to have avoided it). It's a relatively simple trick, the thing that makes it fantastic and magic is the presentation.
http://youtube.com/watch?v=8rWcCuNYcrc is a good example of making it more than just, "Look, I've torn it. Look, now it's better".
(There's another I've seen recently by a British(?) gentleman whom I hear is very well known –even famous- in his area, but isn't well known in the US. He has small round glasses and recently released a 2nd edition of his book - maybe someone could help me out?)
Looking back at your posts you seem to have focused on effects that are released as "tricks", gimmicks, or kits. I would suggest that you pick up 2 books. You'll find hundreds of recommendations as to which ones you should get on these pages, and you could well pick any of them, but please allow me to make two suggestions: One should be a book of effects with some range (Lady of Magic already suggested Mark Wilson's Encycopedia of magic in your intro thread - I swear she must have some sort of system to make commission) so you can find what type of effects work for you. The other should be a book about presentation. These two will be invaluable as they will let you focus on a few tricks, and then how you present them. It will prevent you from becoming overwhelmed and spending money on the latest "cool" gimmick. I wish I had been smart enough to listen to this type of advice when I started out. I bought a ton of books, became overwhelmed and was constantly playing catch up with myself. It felt stressful and it should be fun.
Finally, you said you were new to magic so like most of us you probably have been doing a fair bit of surfing around sales sites looking at demos. Often to induce hype and excitement the demos feature “OMG! WTF!” type responses. In the real world these seem rare, they break the flow of the routine and while they are exciting I almost prefer seeing demos that show REAL shock. My first reaction to a brilliant performance is not to run around screaming – but to quietly admire it and allow myself that small moment of awe before trying to figure out how it was done. Being from America, I hate to admit that a lot of the screaming at magic c**p seems to have originated, or at least been popularized, here.
Best of luck,
-Tyler