I'm hardly the cooler expert.
I recalled seeing a review of the H50. It's here:
Corsair H50 CPU cooler review
Looks like an effective cooler, although not superior to a good air cooler. I don't like the fact that it requires the 120mm fan for the radiator blow into the case, but that may not be a problem in practice.
The Noctua HSF looks like a good choice, if the size and weight aren't a problem. (My Thermalright Ultra 120 is heavier, though - 790g without the fan, versus 600g for the Noctua. That may not imply that the Thermalright has better performance. It lacks the direct heatpipe contact, for example.)
It's too bad about the Tower 120. I imagine that more or less generic backplates would exist for an LGA1366 mainboard, but the matching clamping plate for the cooler would be proprietary.