Eventually I switched to an online cross browser testing service and I have continuously evaluated a handful of them over the past years. Yeah, it isn't that easy to find the perfect balance between ease of use, browser availability and testing features, connection speed, support and price - and things change fast in this online sphere.
Recently I switched back to Browserstack and I must say I am impressed with the updates they have made over the last years. Roughly estimated it is top of class in all areas. Shortest way to local live testing, really good speed and all the testing features one can expect of a complete testing environment. And I especially want to applaud them for having a cheap freelancer plan - finally someone who is also considering the needs of the small individual businesses.
Check it out: http://browserstack.com.