Eheim are good but they have a big foot print and are pricey. The 1260 has a footprint of approx 9x5x6, uses 65 watts, flows 635gph and costs $165.00 or so.
The tunze silence line are great pumps. I have the 1073.020 as the return on my 40B. The tunze is about 5x3x4, uses 30 watts, flows 634gph and runs around $80.00 or so. Its the quietest return pump i have used. They are a little noisy at first but once they break in you cant hear a peep out of them.
I'm going to replace the quiet one 3000 i have running in my 60 gallon with either the 1073.040 or the new controllable 1073.050. Tunze's support and warranty service are amongst the best i've dealt with.