the G.skill is fine. Heat Spreaders are for overclocked memory, really, or looking nicer. No real performance effect.
you could probly save a few bucks by getting a different case, the 690 II is very big for a micro-atx board like the 880. a Challenger or Destroyer or Blackbone might work well. Of if you're going for an HTPC, the coolermaster 360 Elite looks interesting