New tyres? Yes or no

[Rabbit22]

Hi I have been lucky enough to buy a 2005 fz6 on a 05 plate low mileage 7000.
While checking the tyre's condition I thought I would check the age of the tyre front dot 2604 &  rear dot 3204.
Their is no visual damage or cracking to tread or side walls, and plenty of tread left on them, so the question is would you replace them due to age or not?  If you would replace to what trye ( dry weather riding only)