There are plenty of solution and a lot of them don't have to break the bank. I have the us1641 which is more or less identical.
The thing to get your head around is your most likely recordning a band live. So this will require each musician to hear themselves as you record to the multi tracks.
You don't want this to be after the fact as there will be latency. Forget about needing extra outputs because it won't work for live,, that's only needed when overdubbing, and most we only overdub one part at a time.
What you need is a analog monitoring system that is in front of the interface.
Ultimatly you have a mixing board that can handle all this and split the signal to both the monitoring ( headphones) and the recording ( interface). I get buy with what we have on hand which is a hodge podge of Medium and small mixers.
You will be either recording in a studio type setting or recording your band live. Recording the band live is different and there will be leakage. I will talk about recording in a studio type setting here.
Mostly you want a good drum take, everything else can be overdubbed later on one part at a time or just a few punch ins. So the drummer needs to hear the guitars,singers and bass to play nicely. The good thing is you won't need the drums in the headphones unless you lock the bugger in a soundproof room. So patch the whole band to the mixer and send that to your headphone amp. You won't need the drums in that mix.
I then mike up the drums and they either go via a different mixer for processing or direct to the interface usually both.
The vocals and guitar are sent via Aux sends (or direct outs if you have them) from the mixer to the interface. The Bass is split from a DI and they also have thier own small headphone mixer.
The guitar is a DI output with the speaker off ( Blackstar Amp) or could be locked in a iso booth or box. Lots of options but it has to be quiet in the drum room.
There are lots of ways to rig up a good headphone mix but it involves mixing boards not interfaces. These are also super handy I use mine live too.