Its 60x60mm and 25mm tall, 30cfm @ 39db, basicly a Delta30 clone.
If you can find the orginal HS fan PowerCooler 70mm might not be a bad choice to go, its loudness it comparable to the fan on the Taisol CGK. Going YS tech you won't notice much of a difference, if you do want something noticably different Sanyo Denki H speed would be a good choice, performance will go down quite a bit but if your not overclocking it won't matter.
GiZzO's Fan Database Page