I would highly suggest buying everything used, they are like cars once you get them off the lot these loose value fast. I learned the hard way when first starting off getting everything at guitar center. I bought a Motif ES from there new, looking back I could got like 2 used solid pieces for that same price.
I really like the Akai MPK controller, I think Tony Lo recently got one, and he can attest they are dope. I have never used the oxygen controller, but I have had M-audio dj controllers in the past and they where very good build quality. In reality a controller is just a controller it triggers midi notes on vst's. I think the main thing to look for in a controller is a lot of rotary knobs and buttons because in a lot of these programs you map those knobs and buttons to effect filters and functions.
MBox's are solid, the mbox you linked is good for really vocal recording, but it lacks muliple inputs. For hiphop its fine, but if you had a band I'd say no, because it would be hard to record a few people at once.
Mic good, I think most condensor mics at that price point are going to be similar. I use a maybe a 10 year old Russian brand mic, company went out of business. Its not best mic, but has character, and gives it flavor. I don't rap anymore, so its collecting dust haha.
I highly advise learning ableton live 1st. Acid pro is good for samples, and rearrangements. Ableton kills it in making tracked out beats, and synths ect. Ableton is also getting better with every release, while Acid basically been stagnant last few releases. Learn both, but master Ableton.