Personally like mag drives and quite one. I just bight a quite one 6000 (1500 gph) a week ago from fosterandsmithaquatics.com for $100. The 4000 is $63.99 summer sale and it's 1000gph. Here is the link. http://www.fosterandsmithaquatics.com/product/prod_display.cfm?c=3578+4587+9849&pcatid=9849