We won't say the homegrown HTPC is making a comeback or anything, but shortly after Lian-Li laid out a new pair of cases, in flies MSI with a new duo of media PC-centric video cards. The R4600 series is comprised of the R4650 and R4670 (ATI), both of which are available in 512MB of 1GB flavors. Aside from boasting an all-too-useful HDMI port, these cards also support 7.1-channel audio output for use with internal Blu-ray drives, and the design is such that they won't infringe on any other nearby PCIe cards. Per usual, MSI left u