Scythe Ninja demands little air for good/quiet cooling. It's a large vertical HS.
Big Typhoon demands much air for good/loud cooling. It's a large vertical HS.
SP-120 has some platform compatability issues. Not many but some.
SI-120 fits all current boards and chips=very resellable or to use for any future build.
Blue Orb is very large in diameter and heavy. Cools good for a non-heatpipe but is not quiet about it.
AC Freezer 64 Pro is highly under-rated. It cools very well according to review and what's been posted here
in the last month. It is inexpensive for what it offers.
I was going to buy a Asetek VapoChill for a P4 2.8 system that needs some up-dating. But after reading about the
AC 64 Pro, I just might buy the Intel model, the 7 Pro.
...Galvanized