Depends on your price range... you can get some
decent Wilkinson tuners - $26 -
www.guitarfetish.com
good Grover tuners - $45 -
www.guitarcenter.com
excellent Sperzel Locking Tuners - $65 -
www.stewmac.com
Just make sure they are a step up from what comes stock, which very well could be excellent, and then buy the best you can afford. The prices and models above are just for examples ....you may be able to find other equally good tuners at even better prices. You can also go the Ebay route with used tuners and new tuners.
Give the installed standard set a good workout.....you may find they fill the bill quite aptly!