SSF Sifus...

I need some help...i'm new to SFF...

I would like to build a new PC for entertainment purpose and hook it up to my TV via HDMI...

I need some help in terms of guidance.. where do I start?

Been to Low Yat and the selection of SFF is minimal..

Once I get the SFF casing, what next?

I hope some one can really help me out here...Thanks in advance!