I use a rio 2500 in one sump and it's been running almost steady for the last 12 years. I've had no issues with it whatsoever. Mind you, this particualr pump doesn't do a thousand gph, but it's been super reliable. Great brand.
I used a mag 9.5 in a rack system and that pump worked great. I'm using a mag 12 in another sump and its been running straight for about 2 years with no problems.
I'm going to use a mag 24 in my 360.
All the above pumps are relatively easy on the hydro, but to be honest, I've never really done a cost breakdown since I really have nothing to compare to.