ASUS E35M1-I Deluxe Mini ITX Motherboard is really good since it's passive cooled so really quiet and has built in wireless, that's assuming you want/need wireless for your HTPC.
If you don't need wireless I would just get the cheapest option available for you tbh, since it is the same APU so the only difference are the features which are pretty much the same except for the ASUS one that I mentioned since it has wireless built in. Although having said that I would get the MSI E350IA-E45 since it's the second cheapest option available in Australia and that I don't trust ASRock and that I'm a bit of an MSI fanboy.