80 Series Suspension

I have just recently replaced the front and rear springs on my 97 cruiser wagon due to them being badly sagged. I fitted Pedders Trak Rider springs and was told that they are 20mm longer than standard. Do I have to fit longer shocks or can I fit the standard length shock for this vehicle. I know some out there will cringe at the mention of Pedders, but I have been using their equipment on my vehicles for 15 years without any problems, and the cruiser seems to handle a lot better especially when loaded up. Can someone recommend a good brand of shocks that won't cost me a mint. I won't be doing any serious off roading (Gibb River rd, Cape York, etc) for a few years, mainly on road and beach work. The vehicle has a rear wheel carrier and bull bar fitted, and the only other bit of kit I am likely to fit will be a dual battery system.