Well, I'm hoping the new season will be good and that Matt Smith can pull off all the eccentricities that the Doctor has. I haven't seen him in action, yet. Since Tennant is leaving, I hope he considers doing more Big Finish audio. He did some voice work for Dalek Empire III (as Galanar, since the Doctor wasn't a part of that series) and for various other episodes as various other characters. He also, if memory serves me correctly, played Luther Archwright in Luther Archwright. However, as far as Tenth Doctor audio goes, Big Finish doesn't have the licensing for it, so BBC Audio will be handling that for a while.
As far as recommendations go... I suggest the Eighth Doctor series. It's a serial, so it'd be best to start at the beginning. Though, for a Dalek fix, Blood of the Daleks is a really good Eighth Doctor stand-alone episode that also explains how Lucy Miller became his companion. A good creepy Eighth Doctor episode with Charlie as his companion is Embrace the Darkness. Great to listen to at night.