I think it depends on how much you want to spend really, swapping bushes can be an expensive and long process and vitrtually everything was seized on mine and it was a real pain to end up doing (well for TGM rather than myself anyway!)
If you want to go the coilover route then there are a few options around starting from D2 Racing which seem to work very well on the DC2 and aren't silly money, and have sensible spring rates so the ride shouldn't suffer too much if you wind the dampers down a bit. Then you've got the Tein range again, works very well, and you have the choice of various models to suit the budget.
I went with the buddyclub racing spec coilovers for two main reasons, gas filled and height adjustability without changing the preload on the spring.
You can also use fixed dampers, such as tokico or Koni and use a good spring which will work well, and comes in around the same sort of price as a lower to mid range coilover.
One thing I would recommend is to invest in adjustable components for the car so the entire geometry can be set-up to what will work best for you. I've currently got adjustable camber arms front and rear, adjustable toe arms on the rear and will soon have adjustable castor for the front as well. The adjustable toe and camber arms i've got are made by Eibach/SPC and are reasonably priced as well. The castor bolts are Whiteline and are only £15 ish, so i would seem silly not to try them out!
One word or warning though, the more things you can adjust and play with the more you can mess things up, Brands Hatch yesterday I was getting frustrated trying to get rid of some understeer and things were slowly getting worse the more I tweaked things :roll: :lol:
