Sounds Luke you have made your decision but as mentioned above the softer gg compound will wear on the roads at 399 miles a week so you cost reasoning goes straight out the window as they will need replacing much quicker than the yoko
Nothing road orientated is going to be as good as a R888 or FZ201
Another option is the federal 595rsr but its another half way house
Depends how serious your track work is if at all
They are not very good dedicated track day tyres
Too much tread movement due to larger tread blocks
Always favour a dedicated track tyres and road tyre