Can somebody be kind enough to help point out the cheapest option to ship a 90 lbs package plasma tv from the US to Swiss i am a freq user of USPS but they don't ship packages bigger than 70lbs?

Not sure about the cheapest, but probably your most reputable International Shipping companies are Fedex, UPS and DHL.

I would personally go with Fedex or DHL, and use UPS as a last option based on personal experiences dealing with all three in the past.

As far as actual cost, you yourself can go to each company website and calculate shipping costs for weight from the US to Sweden. And you may also want to include insurance for a plasma television.