Any AMD fx4100 users?

[glenn]

Hello,
I finally have a (very) small budget for a computer upgrade. Current is Pentium D920 2.8ghz (dual core). Evaluating systems with AMD fx4100 3.6ghz or Intel I3 3.3ghz.
My typical work flow is SU > Photoshop elements. Mostly renderings/illustrations, sometimes animations. Typical (rendering) SU files: small 5mg, most around 10mg, infrequent around 30mg. Photoshop files 10mg to 50mg, with the occasional 200mg
How does SU 7 perform with fx4100 or i3?
I know it currently only uses one core.
I’m a little confused about running SU with W7 64, which version is necessary: (home premium, pro, ultimate)?
Thank you for your comments,
Glenn