This is a Ford or Chevy discussion, but I will pile on anyway.

M-Audio Fast Track Pro is my interface. Honestly, though people will weigh in with different opinions, when you think about what it does, outside of form factor they are not really all that different. There's a lot of "soundcard" discussion, but this hardware is essentially playing back recorded sounds, not generating them. Just translating the math involved with recreating/interpreting what is already there.

My keyboards are all OLD. I use Ensoniq keyboards. The company went out of business in the late 90s, so that gives you an idea how old they are. However, another matter of taste. I like the way they sound. Harv mentioned the interface. Well, as deep as I get into it, it's the bank button, and the patch button. I don't tweak sounds, don't bother with MIDI at all because of something I will mention later.

My mics are all Shure M58. I have one M57 that is a carryover from my live days and that was used to mic instruments.

I have powered Wharfedale monitors. 100w and teh slew rate is great so they can burst and recover without any lag.

Depending on how you choose to roll, your "off sound" gear is important. I just changed to a Behringer control surface so everything I do is digital now, but for years I was all analog so I have a ton of gear. I have 4 Alesis digital reverbs, 2 Behringer 31 band EQs, a drum machine, a vocoder, and a MIDI patching system that allows me to change master and slave at a touch. Too much to explain here, but I will say that after some programming it makes it very simple to change master and slave configurations. I have MIDI controllers but I rarely use them. All M-Audio, a 61 key, a 49 key, and a 25 key. Also a MIDI drum pad controller that I rarely use. I buy a lot of gear for a specific reason and then it sits in the corner when I'm done.

I haven't mentioned 6 guitars and 4 saxes....

All a matter of what you want to do and what you need to get it done.