I now use a set of Magnacore string on my modern cello. This is a really bright-sounding instrument, easily harsh on the top ends. These strings helped valorised the mellowed side of my cello, while still allowing huge dynamic range and flexibility. I would recommend for any type of professional ranged cello, especially the modern-sounding ones.
Durability-wise, I would change this string every 4-5 months when played every day at professional level. This is slightly longer than the usual opinion about Larsen strings for cello.
