Snidy, no worries about the temp. My CPU runs at the similar temps. My rig:
1.33 266FSB (OC 1.4)
Asus A7M266
Crucial 256MB DDR 2100
GeForce 256
2 20GB Deskstar HDs.
CD-ROM and burner
NIC, sound card, and modem
I'm currently using Thermaltake Mini Copper Orb and it idles right at 50. After ~3 hours of UT, it will max out to 54~55.
I also have a Vantek with a Delta fan (the heatsink looks just like FOP32) which keeps the CPU a few degrees cooler than the Copper Orb, but it is loud!
So I'm currently using the Copper Orb.