Best price Shimano Dura Ace 9000
Shimano Dura Ace 9000 11-speed groupset
Top of the Shimano range, albeit without the electronics, it’s the 11 speed Dura Ace 9000.
This is the most expensive option in the Shimano groupset range (apart from the Di2 version). It’s aimed at high end riders who need to squeeze every bit of performance out of their bikes. People who race, essentially.
It’s the lightest of all the Shimano groupsets, but in terms of performance and feel, most people say there isn’t much difference between Dura Ace and the next set down, Ultegra.
Essentially, it comes down to this. If you’ve got money to burn and have to have the very best, get Dura Ace. If you’d like to be a little more value for money, go for the Ultegra range because it’s just as good performance-wise, but is less expensive AND will probably outlast the Dura Ace too.