Go for decent wedges, you have enough now. While that longer driver might be tempting, you'll use the wedges way more than the driver and they will make a bigger difference in a more important part of the game--your short game.
Your wedges should include a 64, 60 and 56. This will space them properly and then you can have some serious fun learning all the different shots with them-pitch, punch, flop, chip and full. :-)