I was deciding between Koni's, Bilstein's, or Tokico's. Koni's are guaranteed for life and were recommended by a lot of people so I went with them. I gotta say I love mine.
I have the Ford C springs and have Koni Sport yellow struts and shocks which are pretty firm, but handle great. If you get Koni reds they have a bit softer ride.
Both yellows and reds are completely adjustable. The struts have a nut on top you turn to adjust them without having to remove them from the car. The rears have to be unbolted at the bottom to adjust but I never mess with them anyway.
www.shox.com has the best prices for struts/shocks.
Good luck!