Planted Tank Enthusiast
Join Date: Oct 2003
Location: Lancaster, PA USA
I have a filter from both lines, and overall I think that although they are both great filters, I prefer the Rena Filstar line more. I think they are both really quite (Eheim is quieter, but the Rena is still really quiet), but the Rena has better options out of the box. It has all the tubing, spraybar, and extensions that you need, whereas, I've had to buy a few upgrades for these types of things for my Eheim. Plus the Filstar has better flow rates and media capacity. All in all, I think they would both work great and you would not have a problem with either, but the XP3 is still my vote.
Regardless of price, I think the Rena is actually a better filter then the Eheim (at least for my purposes).