My room is oddly shaped like yours and the 60's and now 80's have been great.
I think that setup would work fine for your room. You might also consider the m22's or m60's which have been known to give you better detail in the highs. The 50's have been described to be a little more laid back, but this is not always a bad thing.
The 350 is a killer sub for the money, you can't go wrong with that. The 100 or 150 would be fine. It looks like you won't have lot of viewers based on the couch layout, so the 100 might be fine. The 150 helps if you have multiple seating and wider audience.
Either of those receivers would be able to power any of the Axioms I've mentioned with no issues. Just make sure you get all the bells and whistles your wanting.
Any of the Axiom setups, even the smaller bookshelf setups would blow away the HTIB Kenwood out of the water.
