Depends what you want the car for and how you drive. Your not going to come across understeer in a vr unless your driving like a lunatic which you won't be on the public roads. 16 valves will see you changing gear alot under normal driving whereas a vr will go everywhere in 5th gear if you want it to. Vr is the better cruiser by a long way, feels nicer to drive and the engine gives off far less vibrations than a 16v. Best engine for the mk3. Chains are only expensive if your paying someone else to fit them and the vr engine is pretty simple to work on. All in all the vr6 is a far better car than a valver but will cost you more to buy, insure and run.