XBMC Hardware Specs Group #5 Build

I have two different computer builds and wondering which would be better to use for XBMC. The other will be used for unRaid.

MSI A55M-P33 FM1 AMD A55 (Hudson D2) Micro ATX AMD Motherboard with UEFI BIOS
OR
ASRock A55M-HVS FM1 AMD A55 (Hudson D2) HDMI Micro ATX AMD Motherboard
OR
MSI A75A-G35 FM1 AMD A75 (Hudson D3) HDMI SATA 6Gb/s USB 3.0 ATX AMD Motherboard with UEFI BIOS

With the last two motherboards having HDMI out already, would I need the seperate graphics card since the cpu has the Radeon HD6410 gpu?

AMD A4-3300 Llano 2.5GHz Socket FM1 65W Dual-Core Desktop APU (CPU + GPU) with DirectX 11 Graphic AMD Radeon HD 6410D AD3300OJHXBOX
SAPPHIRE Radeon HD 5450 1GB 64-bit DDR3 PCI Express 2.1 x16 HDCP Ready Low Profile Ready Video Card ( 100292DDR3L)

This has typical 4g memory, good case and psu.

ASUS M2N-E SLI AM2 NVIDIA nForce 500 SLI MCP ATX AMD Motherboard
AMD Athlon 64 X2 4600+ Windsor 2.4GHz Socket AM2 65W Dual-Core Processor
GeForce 8500 GT 512MB 128-bit GDDR2 PCI Express x16 SLI Support Video Card

This one also has 4g memory, case, and psu.

I guess I am just concerned if either would be able to handle ripped bluray/hd streaming? This is my first venture into a htpc. I would consider myself a "Group #5" build.

Thanks!