i am using BE 2010 R3 currently to backup SQL 2008 db and other 2008 machines.
we will be deploying a new machine, running windows 2012, and SQL server 2014. will my current BE version be able to accomodate the new machine?
No...BE 2010 R3 doesn't support either of them. You'd need to upgrade to BE 2014 (soon-to-be BE 2015) in order to support those applications.
If you have active maintenance you'd simply download the trialware and request new license keys. Upgrade the media server, and push-install the RAWS agent updates out to your remote servers.
Make sure you've checked out the new BE 2014/2015 interface and how it works.