It really is amazing what you can do with furniture and an imagination. Ikea is the best go-to for lower cost furniture that ranges from modern to classic. My couches are from Ikea and I love them - you can easily take off the machine-washable slipcovers and they are comfy to boot.
I always wondered what people did with the bare bones furniture that Ikea sells and I found my answer. They are PERFECT for DIY projects! I found a few below and my jaw is still on the floor as I write this. I may have to try the nailhead tables myself!