One note, the Option 5- Immigrate to UK under Tier 1 option is NOT anymore open, and has been closed for immigrants for more than 6 months so far.
Check the link:
http://www.ukba.homeoffice.gov.uk/workingintheuk/tier1/general/
Check the link:
http://www.ukba.homeoffice.gov.uk/workingintheuk/tier1/general/