If you're looking for increased consistency from the tee then the first thing to think about could be the acquisition of a brand new golf driver like Callaway drivers. All modern drivers are tremendously forgiving due to the massive sweet spots they possess and all provide good distance. Your confidence will surely increase as long as you see your tee shots consistently sailing down the centre of the fairway.
The second one club you may want to have a look at probably is some new fairway woods or, alternatively, maybe a couple of the hybrid clubs which are now available. A cross between a fairway wood and a long iron are incredibly simple to use which can help you quickly get the ball in the air. They're also more forgiving compared to traditional long iron.
Probably your most important equipment will be the golf putter. You'll be using this club for about 40% of the time throughout a game of golf. Nothing can be more frustrating than reaching the green in regulation, but only to come off with a bogey or worse as a result of bad putting. Try out a few of the new putters which are in the market now.
Source: Callaway Diablo Edge irons