Meeb, PPJN
http://www.ppjn.com/ has some details about Euromanx salaries.
Isle of Man residency is straightforward for a UK National or EU citizen.
Search the Isle of Man Government website
http://www.gov.im/ for details.
Broadly speaking you need to be resident for five years to gain a work permit. However, if the employer cannot find enough recruits locally, then they can make an individual case for taking you on. For Euromanx seeking pilots this would obviously not be a problem.
Of course, if you are going to move to the Isle of Man then you need to be sure that your employer is reasonably stable. Quite a few long haul pilots (Virgin, BA and Mytravel) live on the Rock and commute to the UK whilst remaining non resident for UK tax.
It's something you have to look into quite carefully though.