I have 3 sets of shimano Deore
1 set of hope Tech 2
2 sets of Avid Juicys
2 sets of Guides
1 set of Levels (the cheapest ones)
Guides are by far the best of them and the Levels match all the rest in every way except for the non split lever clamp.
Believe it or not the Shimanos are by far the most problematic. with seals/pistons failing.The Hopes need bled most
Juicys have lasted 10 years and are still going strong with multiple DH/Alps trips.
As above Level feel nice. like a slightly less powerful Guide. They cost less than £30 an end with Tredz voucher. Complete bargain