I have rug #2 (though don't have it out atm due to repainting the room it was in)and it is very pretty in person. The base color is a bit more of a cooler green than it appears in the overstock pic online (on my monitor anyway). All the rugs you posted are nice, so think it all just depends on the overall look and color scheme you are trying to achieve.

Here's one idea, I drew this on my phone if you couldn't tell. Dining area in pink: if you want a sideboard/hutch for dining room I have placed to the left. I don't really like the idea of coming up the stairs to view the side of a sideboard, but you don't really have clearance to spare to place storage on the bottom wall (I'll call it South) because you only have 12 feet between the head of the stairs and the South wall to fit in a substantial dining table and walkway from the kitchen to the living room. I guess if you knew you wanted a sideboard where I've indicated, you could get a contractor to build a nook for it which would keep the look a bit cleaner but less open from the stairs. Music nook in green: window D kind of had me constrained in that I would've liked to of put a sideboard right in front of it for your music gear. As it is perhaps a full height built-in in the corner if the windows don't extend right to the corner. I put a couple of chairs there for additional seating and music selection. Another potential place for a sideboard is along the back of the couch, but because the couch is likely going to be placed quite close to the dining table, a sideboard behind couch would possibly impinge a bit too much on the circulation route to glass doors. If the stair railing is glass, you probably don't want to back the sideboard onto it, so your options for placement are a little limited in my opinion. But I may just have no imagination. seating area in blue: I think there may be a pinch point between the dining table and the seating area in the living room. I've tried to solve that a bit by using a sectional instead of the long couch and additional chairs. Not sure if it's successful.

Jute rugs IMO belong outside at the door entry and no where else. They shed crap on the floor constantly. I find seagrass a nice option not the nicest on bare feet but not bad.

IMO a large art work on that bare wall is all you need and as for a buffet could you post pics of the rest of the living space that will help with ideas. I love what you have so far other than I do not like fake flowers anywhere , blue is aninteresting color to work with and I would need to see the rest of the space sbefore hazarding a guess. I also think captains chairs are a dated look especially inyour space which is leaning toward contemporary.Why not try a blue vase in the alcove above the frieplace for a start .The art could also have some blue and then see what you would want for more blue.