Currently, I have this one.
http://db.sanyodenki.co.jp/product_db_e/coolingfan/dcfan/dc_fan_detail.php?master_id=484
But I think I'll be using this one instead. I changed the 10 V to 12 V and so far its working fine.
http://db.sanyodenki.co.jp/product_db_e/coolingfan/dcfan/dc_fan_detail.php?master_id=1926