Dear Brother Ijlal, Quran never sanctioned or condoned polygamy! The verse 4:3 usually quoted for this excuse has been translated such way (with the use of brackets) to suit this crime, forgetting conviniently the subject of the mater is orphans and the addressees are the people "ANNAAS" both male and female 4:1 and NOT just "MEN".
Verse 4:3 is talking about taking responsibility of female orphans(by both men and women) to marry them off in "twos", "threes" or "fours". It's not saying to marry with yourself two or three or four of the female mothers(again conviniently added in brackets). There is no mentioning of "special circumstances" except untill a dynamic Quranic society as a whole has not been established; which will take care of orphans itself.
Putting it bluntly, the use of the words in Quran should have been enough to understand had we not been blinded by the culture men created for themselves and not what Allah ordained.
All the related verses have also been translated in such way to give this impression as if polygymy has already been sanctioned in 4:3, which is baseless.
Leaving everything aside, even whatever excuse you may come up from whichever verse, you can not deny the final order given about marraiges.
It's good you gave example of khamar. As usually for this we don't ignore the final verse which catagortically states it as something satanic and hense call it haraam.
The final order on verse on marraige comes in Surah An-Noor, which I always remind is the only Surah starts with a reminder ...
This is a Surah that We have sent down with a Decree of Law. Clear Commandments have been given in it for you to bear in mind.
and the order goes like...
And marry the singles among you, (whether they are widowed, divorced or bachelors). They may marry the righteous among your male and female servants. If they are poor, God will enrich them with His Bounty. For, God is of Infinite means, and He knows all things.
This verse leaves no doubt even if you are not scared to distort the true spirit of other verses.