Well I know you are getting into more mentalism but are you interested at all in dabbling into some Bizzarrist stuff? If so check out outlaw. http://www.outlaw-effects.com/store/
Yeah, I have to echo the Outlaw Effects stuff if you are looking for some really interesting props. The nice thing about the Outlaw Effects props is that you can use them for a quick 3-5 routine or you can weave a tale that can span 30 minutes or more.
I might recommend the Jinn Box. Like most Outlaw items - each item is hand made and aged to look (and smell) like an artifact from a different era. The routine is a mentalism effect but the real strength is in the story you weave. A jinn is what we English-speaking folk would call a Genie. The spectator is given 4 wooden plaques from the Jinn Box. Each aged plaque has a list of wishes that the spectator can select from. After the spectator mentally selects her wish, you can divine the wish without ever touching the box or plaques.
Outlaw has some killer book tests as well (Reflections is a wonderfully unique book test). I have a bunch of Outlaw stuff now and they are amount my most prized magic props! My...precious.