That's a jolly good deal! 
GR80 is still very popular amongst motorists and is generally very reliable.
Wow, good rating for GR80.
I "NO REGRET"

to use the Stock Toyo until 25000 km now. Still going well.
Will change the tyres after I feel enough of it.
More quiet & reliable & better grip is good, so, may change in near future. May be after 28000 or 30000km. My next service is 28000km. ^$^

Regards.