Welcome to the site Macca!
I've been using Kenda Kruz tires front and rear lately. Previously I tried Metzler Marathons (long lasting but pricey) & IRC Wild Flares (inexpensive but wore out fast).
The Kendas are half the price of the Metz, but last just as long. If you want to go fatter, you can go 130/70 on the front.

Steelheart- '03 Speedmaster Black/Yellow The Hayabusa Killa 16" Shorties/140 mains/Airbox drilled Procom CDI "There is no cure for Celibacy. But we can treat the symptoms."