Always remember opinions are worth exactly what you pay for them.
After that, take a general consensus survey. Some people mix with headphones, some don't. It'll be personal, and what works for you. I do both. I can start with headphones, and end up on monitors for a 'Yeah, I'm really done this time!' mix. I have a few sets of headphones and monitors, just to get an idea how it'll sound on different 'systems'.
When I shop for headphones, I look at specs. 'Sensitivity' is how loud they'll be. More is better. 'Maximum Input' is how much of a signal they can take before they start to distort. Again, more is better.
Looking at the specs for the 280 Pro, a sensitivity of 102dB means they'll be loud, so I'd imagine I'd hear less of the outside world, if that makes sense. They only take a 1/2 watt input, which on the one hand means you don't have to crank your tracks up too much, but your levels will be up there a bit. That means not much room to go further, if that makes sense. But those specs do me fine. If it is really critical, or the kids are going ape shit in the living room, add a headphone amp. The cheap Behringer one works fine.
The 280 Pro is under $100, so I'd try them. They're probably fine.