trying to avoid a skunk butt rug

My definitely-too-small, cheap living room rug from IKEA has seen better days. I've been wanting to replace it for months now but can't decide what to go with. The room is pretty neutral in color, with some blue accents (patterns on pillows) and kind of ugly red/gold cushions on our dining chairs. So, I'm debating sticking with something neutral, trying something that has both reds and blues, or just running with blue. I have my books organized by color (very rainbow-y!), and I kind of like the idea of playing that up (hence option 4).

Tell me which one you like! (or if you happen to have seen a great rug out there, leave me a link)

1 2 3 4 5 (cheaper version)