The $100 opamp?!

[moeburn]

http://cgi.ebay.com/ws/eBayISAPI.dll...ADME:B:SS:US:1

If I'm not mistaken, can't you get better stats than that with an OPA624 and BUF634 combination?

 

[Jazper]

looks like a solid state opamp design, there are a few around. IMHO you're better off with a good high end opamps, but ymmv.

note that he doesn't mention the usual suspects here: AD8610, and opa627/637 when he does the comparo

 

[DanT]

Check this tread