Due to issues with our box springs and the wonderful customer service at RC Willey we have been sleeping with just our mattress on the floor for a few months. Thanks to Uncle Sam's stimulus check and the great excuse of an anniversary gift for ourselves we bought a new bed.
IKEA has some pretty good beds. They seem really sturdy and secure. You have to buy a bed base which basicly are wooden slats that you put in a rubber sleeve --- this sits on the frame and then you can just lay the mattress on the slats. Since we have king size bed - we actually have two sets of the slats. We just used the mattress that we already have - but I hear that IKEA has great mattresses too.
It took me a bit - but I put the bed together myself. You can use box springs with IKEA beds but you really don't need to. We have had it for 3 nights ---- and I love it. I cannot believe how comfortable it is.