I am personally running the latest nightly release of CM7 and it's working great. The only problem that I was having before was the market apps that I have installed wouldn't show up but that was fixed with the last nightly build that came out yesterday.
phiermod V2 is the best Froyo ROM in my opinion but using one based on CM7 doesn't make much sense for me since it's so out of date from the nightly builds that has had a lot of work done on it.
I have yet to try HC but out of all my testing CM7 is the most stable for me. A few days ago I would have said phiermod V2 was probably the one with the least problems and was the most stable but after the last nightly CM7 is rock solid. I haven't had any issues so far since I installed it.
phiermod V2 is the best Froyo ROM in my opinion but using one based on CM7 doesn't make much sense for me since it's so out of date from the nightly builds that has had a lot of work done on it.
I have yet to try HC but out of all my testing CM7 is the most stable for me. A few days ago I would have said phiermod V2 was probably the one with the least problems and was the most stable but after the last nightly CM7 is rock solid. I haven't had any issues so far since I installed it.