I'm new to everything and I want to get at least something straight. Only equipment for now is Macbook Pro (mid 2012) Intel i7 2.6 GHz, 8 GB 1600 MHz DDR3. My question is what do you think I should buy next for my recording? My budget is around 3000$. I will be recording vocals and acoustic guitar at the beginning and than later probably be expanding it to some small studio that can easily record and deal with the band.
So my question is. What route to chose? Should I buy some real good audio interface like RME 400/800 and then go straight to my Macbook Pro and deal with everything after (compressor, eq, gate, reverb) in my DAW or should I go PRE with some decent mixer and maybe some hardware compressor, eq or something?
Mic pres on RME 800 are good. But I need your opinion what to do. Is it better option to go with some decent mic pres into line in or maybe to buy Mackie or Presonus mixer and buy some great pres for it?
Any suggestions?
To sum it: I have Macbook Pro and what beautiful toy should I buy next? To fit my budget 3000$ Please help

) Mixer or audio interface, mic pres, ex. comp, eq, gate?
Thanks