Now those temps sound more like it, under a full load. You'll be just fine there. That HSF should work pretty good - you should even be able to get a moderate O/C with it. Unfortunately, I don't have the back I/O clip-in panel, as I never received it with the mobo. That was one of the things I was bummed about when sending it to you. If you want, I can scour Ebay or something and try to find one?
Hope all is well, how does the speed feel in comparison?