I was thinking the 6025 for me at lest one for now, along with my MJ 1200's on my wave maker.....The 6025 is like 17x turn over and the 6045s is like almost 30x for my tank.....I think the 6045 would be a bit much along with my MJs. I don't have but 2 SPS that surf sent me so I don't need to over do it, but these will give me the option of pulling a few other pumps I have out....Or I could pull the 1200s out and keep the Tunze nano powerheads that I have in there also. I really like those too for as small as they are they push quite a bit of water too and the size isn't ostructive.....What I really like is the option to move the direction of the flow. My tank is closed on the sides because of the stand and only has the front and back open which the vortec wouldn't have been very useful. Where these I can place on the back glass and direct it where I want it to go....