I really like the design and (two) features of this cooling pad (which is sold out at this time), or the Notepal U3http://www.flipkart.com/cooler-master-notepal-u2-cooling-pad/p/itmczc2huukbeph8?pid=ACCCXSCFJVU3DH3S&ref=c0131174-c531-4400-a44c-0788f4407a9b
As far as fan RPM's go, there are variables which make it difficult to answer directly. A larger fan will push more air so a slower speed will be as effective as a smaller fan with higher speed
I think something like this with it's big fan should also work effectivelyhttp://www.flipkart.com/deepcool-n7-black-cooling-pad/p/itmd9hqqgtdeqmyq?pid=ACCD9HQ7SSXRXMDB&ref=d6ced112-0aed-4181-ba72-7ad3fbbc8166
and it is in stock.