Well if you want to top Shimano you could go Campy.
Be ready to part with a butt load of long green.
Campanolo is what you find on $20,000 dollar bikes.

Me I think Shimano makes the very best daily ride parts you can get .
But most bikes come with very low end parts , it's up to you to upgrade.
On your bike go all Shimano XT or XTR and don't look back.