Read up on 2.1 receivers out now there are issues for the gamer. Also, gene from audioholics reports that yamaha cut wattage as the internal heat rises from the amp. Not sure if the lastest models still do this to prevent the receiver from going into protect mode, something to consider.
At budget level AVR and only doing 5.1 dont see much difference in the brands.
Going back to the photos if you want to keep the room looking homes & garden maybe go with jamo C93II and S810 sub.
Or the new micro subs SVS REL KEF.
the house come with the sofa TV and telescope ? Id be remiss not recommending again the starter system 2.1 route for that room. triangle/jamo C93II jamo S810 and a entry AVR. Watch some movies, things might escalate from there. It did my case in defense have no plan for outdoor speakers and a buried subwoofer.