It's not ideal, but a lot of people have a setup like that. You really could go either way on the speakers,direct firing or omnipolar, there's really only one listening position (the sofa). The other areas will get mostly the right speaker no matter what you do.
Similarly on floorstanding or bookshelf. If you have or can get a decent sub, and find a place for it, that's a small enough room that you'd do fine with book shelves (given that you can't really expect to cover the other areas well - listenable, but no surround effects, etc). Floor standers may be take up a lot of space in that room. But it really depends on what you want. What works better for you?
I'd suggest starting a thread in the main forum if you want more advice and options. May be someone who has a very similar setup. Use a meaningful title like "TV in corner, long room, options?" to catch people who have run into that before.