Its been a while since I've browsed through the shop extensively, but IMHO, you shouldn't buy any more clubs until you level up some more. The only exception is the Starter lob wedge. The Cleveland 64 is available now, or you can wait a few more levels and pick up a Taylor Made wedge. Its all a matter of personal preference, as well as how many credits you have available in your budget.
As for the rest of the clubs, I wouldn't get a new driver until level 48 (Taylor Made R1) or level 58 (Ping G25). I owned the R1 from level 48 until level 89, and I loved it. New irons not until level 59 (Ping G25) or level 75 (Taylor Made Speed Blade) or level 79 (Taylor Made Rocket Blade). Sure, there are lots of other iron sets available besides the ones I just listed, but they don't have high trajectory, so I don't like them. As for putting, a lot of folks are big fans of the Taylor Made Rossa at level 55, but I held out until the Odessy at level 70.
Also once you get a new iron set with a nice high loft and good distance, most people will recommend you chunk your hybrid into the drink and pick up a 3rd wedge. I like to go with 1 56 degree, 1 60 degree, and 1 64 degree, but to each their own. Good luck.