Flatboy,
This is how I'd rank the Beyer headphones:
1. DT 770 Pro
2. DT 990 Pro
3. DT 531
4. DT 250-80
All of them are very fine, enjoyable and musical headphones with very solid bass response. The DT 250-80 has the smallest soundstage, the DT 250-250 is very likely better (that's what lini says and Beyerdynamic has claimed the same thing), but I have never heard it.
When gloco says the Beyer 770 Pro works beautifully with his Yamaha receiver, then it's very likely that it will work beautifully with your Yamaha receiver as well, Flatboy. The only headphone jack that has too little power for my 770 Pros is that of my portable CDP. But to my ears, even my PC's CD drive and my CD writer power the 770 just fine.
The closed 770 Pro has the deepest and most impactful bass response of all Beyer headphones, it's just as excellent as Snufkin and Gloco have said, but to my ears, even its soundstage is superior to that of the semi-open 990 Pro and 531. There might be less "airiness" and maybe less instrument seperation but there is a clearer sense of space, of the dimensions of the recording venue and of the size of the instruments in it. The 770 Pro has so much bass extension that one can perceive the boundaries of the studio or the concert hall, how the place is energized by the bass frequencies and how the soundwaves are bouncing off of the walls. If the tracks in a mix have been recorded in different recording booths, that's what you will be able to hear with the 770 Pro. To my ears, the 770 Pro provides the most ambience clues, and the most solid, believable and physical soundstage of all the Beyers. With the 770 Pro, instruments have the most body, dimension and realism.