quite possibly. My plan is to replace the rear konis, replace rear anti rollbar bushes (approx £20 each), replace droplinks for rear arb (approx £70 each). (The alternative is to fit the complete arb assembly from a 968 CS, which is adjustable, but is approx £300!)
Worth checking the bushes on the rear trailing arms, but I havent looked into costs if these need replacing.
The main thing to check at the front are the balljoints. Bad news here is that if they are worn you need to replace the complete wishbones - see here http://www.david-gilmour.com/
Then anti rollbar bushes (I presume similar costs to the rear but havent checked yet). You could also fit the castor mounts from a 968, which should tighten things up a bit. Not terribly expensive.
Another thing you could do would be a 4 wheel alignment check. This would cost approx £150. I am going to wait until I have done the above as some of the work (particularly the castor mounts) would need a subsequent realignment.
Having written all this down it looks a lot worse than it really is! Assuming your rear trailing arms and front wishbones are ok, you should be able to make quite an improvement for not much outlay (well that is what I am hoping anyway!)
Steve