Adjustable Thermostat/fan, Worth having ??

[HandyAndy]

I,m getting to the last few jobs to do to my car & was wondering if its worth fitting an Adjustable thermostat so that I can set at what temp the rad fan kicks in.

I,m using the 1.8CVH engine but plan on upgrading to a Zetec in the future.

Is it worth installing such a device or is it overkill & should I just stick with the standard cooling system?

Your advice/thoughts please guys

cheers
andy