IMHO If you're mainly a console guy - go the DFC, you will be fastest in an environment you are best used to.
If you're mainly a PT guy, used to mixing in the box, go the ICON.
If you're a console guy interested in flirting with some PT integration, go the system 5.
For TV, I dont think much can currently beat an ICON. Custom groups, templates, PT integration and dedicated dyn/eq section all make for a very quick environment to mix ITB, far faster than the DFC or Sys5 atm. System 5 is getting many ICON features onto the board as EUCON gets updated but the layout is driven by console guys rather than PT guys IMHO - so I dont think it will be as fast for TV though I'm not a sys5 expert.
Certainly tonnes of ICONs in SOHO and throughout Australian broadcasters for quick turnaround TV post.