Yeah, these are Danner Mag 5's. They are decent pumps. As Tecumseh mentioned, power consumption is high so you would definitely be advised to run inline.
They also leak at the impeller cover when run inline. You need to remove the impeller cover and run a bead of silicone sealent to seal them. Not a big deal.
I've also heard that the inlet barb tends to crack, but that hose clamps prevent this. (I don't have a good understanding of this issue. I use clamps anyway.)
If your system can really benefit from the relatively high head of these pumps, they are a good buy.
Mine is a tad noisier than my Eheim 1250, but not bad at all. Vibration is much more of an issue, but can be taken care of by using padding when mounting the pump. (The Eheim needs the padding as well.)
You might want to take a look at the Mag 3 specs shown side by side with the Mag 5 specs
here.
The Mag 3 has the same max head, but lower flowrate and lower power consumption. You can get the Mag3 somewhat cheaper too. Which one works better will depend a lot on the system it's used with.
Another thing to consider, my Mag 5 puts out much more magnetic field than my Eheim 1250. You might want to avoid these pumps if the pump must be close to your monitor. This issue seems to vary a lot from monitor to monitor though. You can install shielding to prevent this problem, but if looks are important to you, you may not want to do that. (Sliding a tin can or two over the pump would be my shielding recommendation.)