what cpu cooler is good for this processor ? my board is micro atx, so not enuff space to put enormous heatsink. can someone intro me a nice cooler around the same size as the stock one ? thanks !

how many rpm should the stock fan run on idle and on load ? even with the PWM my one run noisier than my kelisa engine. it reaches 4.6k rpm sometimes, and with that my idle temperature will be around 39celcius. Since my mobo is an Asus, i turn on the Q-fan, and this has caused a tremendous drop of RPM til less than 2k rpm using stock fan, however my idle temperature started to rise up til 45-47celcius with casing closed. does that consider ok ?