For a good daily driver at low cost I sure like my set up in a KE70.
Just a 5K with a 20-60 cam, same old carb, same exhaust. Still has good pulling power at the low end for traffic, and good economy - 12km/litre. But when you need to get up and go, it really winds from 60 to 100km in third - great for hills and getting onto the freeway! Cost $120 for the cam (Tighe), no changes needed to the lifters or rocker gear, and a really good improvement on the stock 5K.