i wasent aware of the mp60 price dropping, you do have a point tho, $25 more for the 40 is a no brainer, but id be careful putting a 40 where a 10 should be, i made the mistake of putting one of my spare 40's in my frag tank where the mp10 was while it was soaking in vinegar and even with it turned all the way down it was way to much, the undertow was sucking acan and chalice frags from one side of the tank to another