I don't know who David Mellor is, but...
This is a pitch to sell music gear. It gives pointers to some good gear, but these items alone will not let you record "as good as #1 producers". (I should qualify this with the fact that I am not a hip-hop producer, but I do enjoy a few artists in the genre, I am an amateur pop/rock singer/songwriter/engineer/producer)
From your list:
1. Digidesign Focusrite Mbox USB Interface
2. Digidesign Digi 001 Factory
Cannot be used together
3. Mackie M-800 Power Amp
4. Mackie HR-824 Studio Monitor
HR824's are powered monitors, so you don't need a power amp to run them
5. Shure SM57 Instrument/Vocal Mic
6. SM58
Great mics, for some vocals and micing drums/guitar amps, but I would say most hip-hop is recorded using large diaphragm condensors or large diaphragm dynamics, and these are neither.
7. Behringer Ultra-VoiceÇ Pro VX2000
Hmmm... This is about the cheapest channel strip out there, and while it has some merit, you need to realise that there are much better ones out there, and that spending more on your input chain will have a huge effect on your vocal sound. Other (cheapish) options would include (in no particular order) Focusrite Voicemaster Pro, Studio Projects VTB1 + FMR audio RNC, Mindprint Envoice, any of the Joemeek channel strips, etc etc and the list and debate goes on and on and on and on... Do a search for the words "channel strip" and you'll see what I mean
8. Antares Automatic & Graphical Pitch Correction for Cubase VST
9. TC Works
TC Native Bundle 2.0 VST/DirectX
Both of these sets of plugins are probably very good... But you cannot use VST or directx effects in Protools. You need RTAS format plugins.
That doesn't mean that you can't produce great stuff with this gear, but it does mean that this guy is not interested in informing you of how to go about getting set up to produce great hiphop tracks. This guy wants to get the percentage he gets from sales at musiciansfriend for sales referred through his web-site. You are a hell of a lot better off hanging out here in the mic, rack, hip-hop/beats, computer/soundcard and recording techniques forums, doing searches to read up, because most of the basic questions have been covered time and time again. You'll get good advice (and maybe a little bad), but not this blatant and ill-informed sales pitch!
Good luck,
Steve