there was an article not long time ago " Can An APU Beat An Intel CPU And Add-In Graphics? ". They were comparing the best apu at $140 A8-3870K with G620 and a discrete gpu.
As you can see at this chart G620+discrete gpu was faster in games but slower at other applications.
"What conclusions can be drawn from this data, then? Clearly, the A8-3870K is a better platform for general productivity, particularly when you run threaded applications (or do a lot of multi-tasking) able to leverage four physical cores. The Pentium G620 and discrete Radeon card combine to form a superior gaming system."
But this is a compare between the most powerful apu with a lower G620 (not G630). So G630 should be faster also in applications compared to the lower than A8 apus like A6
Anandtech charts: A8-3850 vs G620 A6-3650 vs G620
And also intel cpu will consume much less power.
While that would be a nice office PC it wouldn't really do as a HTPC unfortunately
Mainly looking at the case/screen, the components are quite good
The A8-3870K with HD 6550D is a great solution for an HTPC. Well... its overkill as it well exceeds the requirements. Keep in mind that a dual core at 2.0GHz with any type of recent GPU is all that is required for a good HTPC experience. The integrated HD 6650 will easily handle 3D content and bitstream HD audio. I would argue that everything is fine there except the case.