I have a C2D-E8400 with Hyper 212+ and my CPU is hitting 55C at full-load and 30C room temperature. Used to be around 65C with the stock HSF until it started loosening up after what temperature climbed up to 80C.
mine hits 74C when encoding using x264 yours is waayyyyy cooler
btw mine idles at 48C !! stock cooler, no OC, summer season
You might want to look into replacing your thermal paste or getting an aftermarket cooler. 74c isn't dangerous, but it's not great for the chip either.
As far as the OP, those temps are really good. With the old Core 2 Duos I set my hard limit for temperature at 65c, but I was overclocking aggressively. My old Tuniq 120 kept it around 40c without overclocking, and 55ish overclocked to the limit. 50c with the stock cooler is superb.