that's just the way of the world man.
i totally understand where you're coming from here, and i'm guessing if this thread only got one response which was "hell yeah! buy a mixer" you'd probably have been super chuffed and learned a lot and what not, but you'd still want to upgrade sometime if you stick at HR.
my first rig, and i mean that in the fisherprice sense, was a terratec ews88mt interface (8 line ins) and a behringer 24 channel mixer from which i took 8 direct outs!
i thought i was the shit cos i had a mixer and it looked cool and all the rest, but i very very very quickly grew out of it.
i (stupidly) replaced it with a digi001, just as they discontinued support for them and again, swiftly grew out of it.
next step was a firepod, and this is the point where i felt like i was actually starting to know what i was doing, and actually starting to get a good sound.
the next step was where i am now with the digi 003 and focusrite octopre and a couple of extra pres.
if i was doing it again, i'd definitely start at firepod level AND, instead of upgrading, i would have bought the 003 and kept the firepod for portable recording with a laptop!
obviously, i'm trying to encourage you to go one way rather than the other,based on my experience, but at the same time, there's nothing wrong with setting up around an analogue mixer. plenty of people around here have done that.
i'd just recommend researching like hell and asking those who use them, so you know you're getting a good piece of gear that will last you. It's just too easy to buy a shitty mixer these days! lol.