In my last place I hid wires behind skirting or under the edge of the floor. If you have a laminate type floor there will be a gap at the edge hidden by beading or the skirting. If you have carpet, just lift the edge (a bit at a time so you don't have to re-stretch the whole carpet). You can also get flat cable which is quite easy to hide even if it's essentially in full view.
I'm currently just finishing my "man cave" and have been lucky that I've been able to build all the cabling into the fabric of the building. But even that will leave cables visible between wall plates and speakers/sub. I think you just have to accept some cables.
Mita Coiled Trunking 10mm x 16mm x 15m | Screwfix.com
Have you look at AVforums websit
Have a lot of info there and one of the best ones i've seen. Have a lot of DIY cinema room on there forum.
Flat cable can be really well hidden. My sister had a set of flat panel speakers (basically they were disguised as picture frames). She'd used some very flat cable painted the same color as the wall. It was hardly visible unless you really looked for it.
Tannoy HTS101 review from the experts at whathifi.com
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Q Acoustics 2000 Series review from the experts at whathifi.com
And for AV Amp to power them
The onky and pioneer are both great AV Amp's, But if you ask me out of the two! The pioneer for your money just win for me.
If you play a lot of music to the pioneer is beter at that too. If you spend a bit more money the spec go up. But this is a good starter.