IMO, yes. from any cooler.
I upgraded my Volcano2 to a SLK-800 w/Silent YS-Tech and its 15*c cooler.
Despite what many people say, you dont need a super powerful fan (that`l turn ure pc into a hovercraft!!! lol), to get decent cooling with a SLK-800.
Just buy the SLK-800 & a Silent fan (like the YS-Tech Silent 80mm one, 20dBa, 27CFM) and you`ll get far better cooling with that than the volcano7+ at max speed, plus it will quiet.
And in the future, should you need a better cooling/get a faster CPU that needs better cooling, just replace the 80mm silent with a high performance one.
Dont put a 60mm fan on it though. although it supports it, you`ll be better off with a 80mm, cos for the same CFM, it`ll be quieter.
Also, if you do buy it, dont forget to put the pads on the HS that comes with it, or you are risking your processor core cracking.
here are my temps
Thermalright SLK-800 + YS-Tech Silent 80mm 3pin(20dBa, 27CFM)
"Zalman" thermal paste ("Zalman" cos the paste came with a Zalman MoBo HS)
AMD AthlonXP 1800
Abit KT7A-RAID
Idle (the temp as im writing this)36*c
Load 40*c