BizTalk 2013 - Approach

Hi

I planning for BizTalk production enviroment.

What should be the approach wrt to Versions Iam listing the various options available. It will be helpful if I get some suggestions regarding this:

1) Install BTS 2010 on Win 2008 Using SQL 2008. Do the Upgrade of OS, DB and Apps after BizTalk 2013 release.

2) Install BTS 2010 with SQL 2008 on Win 2012. Upgrade DB & BTS at a later stage

3) Install BTS 2010 with SQL 2012 on Win 2008.Upgrade BTS at a later stage.

  I guess Option 2 & 3 are not supported.

If I go for option 1 will it support in-place upgrade of OS/DB/BTS?

Any other suggestions?

Thanks