The big names in Mentalism are (but not limited to):
Peter Turner
Bob Cassidy
Luke Jermay
Banachek
Colin McLeod
Max Maven
Docc Hilford (not as popular now)
Richard Osterlind
Spidey (Check him out here on T11)
Corinda
Annemann
Richard Osterlind is probably going to be your best resource for all things mentalism as he has produced a very wide range of resources; and his resources cover a lot of material. Osterlind also did a series of DVD's on Corinda's work as well as on Annemann's work. I highly recommend the one on Corinda's book, which have the same title as the book.
http://www.osterlindmysteries.com/store/
Banachek is like Osterlind, resource-wise, therefore, excellent as well. Peter Turner and Luke Jermay are going to be your best sources for current mentalism.
If you're wanting the best bang for your video buck, I'd highly recommend going over to Penguin Magic and purchasing their "Penguin Live Lectures" that are hosted by many of the mentalists that I listed above. These will be a fantastic introduction to these guy's works, and you can then go from there.
Link to Banachek's lecture as an example:
http://www.penguinmagic.com/p/7994
Hope that helps!