Rule 1 Isolate Protein 5lb

My goals are to build maximum muscle hypertrophy. I'm looking for a pure whey isolate, no fillers, thickening agents, as low as possible carb sugars, I'm looking to feed my muscle rather than my hips.
I'm happy to sacrifice taste and mouth feel for protein and nothing else. Your goals may be different.

Value for money is also a primary goal, as I'm consuming protein every 2.5 hours of the day.

Products I've investigated within the last six months:

Mutant Whey 10LB $1.18 per serve
Balance Ultra Ripped $1.69 per serve
MUSCLEPHARM COMBAT 100% ISOLATE 5LB $1.54 per serve
R1 Protein $1.51 per serve

MUSCLETECH NITRO TECH CASEIN 2.2KG $1.54 per serve
MUSCLEPHARM COMBAT 100% CASEIN 1.8KG $1.98 per serve

R1 Protein for me so far is ruling, no other powder I've found has higher pure whey isolate protein content, very low carb content, and the first powder I've found to have no thickeners, in-fact it seems to have next to nothing of anything other than what I want (pure protein). At first I thought, hay: this stuff feels very thin in the mouth, but I persisted with it, and it's doing what I need it to do, build muscle, not add fat to the hips. In terms of value for money, it's also the best in it's field.
Flavour is acceptable.

Also don't forget, if you want to build maximum muscle hypertrophy & minimum fat on hips, drink lots of water, I'm currently on aprx 6L a day, and this is achieving goals.