What driveshaft to get?

Well I have to buy the driver side drive/axle shaft for my 94 SL, I was wondering if I should just buy stock or if there were any upgrades that are worthwhile and not too much more expensive than stock. I've heard of the one piece, but would it be worth buying (the most ill mod the car is CAI and cosmetics)?

There are no upgrades avalible for that part. The one piece your talking about is for the AWD models only and is the main drive shaft running from the transfer case to the rear end.