You can do some comparison shopping online to see what exactly your options are. For that matter, you can even order your new double bed frame online and save yourself a trip to the brick and mortar shop close to you. The Internet will offer more variety than a local store, with the same great customer service. Some online stores will even offer free delivery and set up of your new bedroom purchase. Keep an eye out for coupon codes to use with the retailer you decide to shop with. If you time your purchase right, you can save a considerable amount of money.
Another thing to keep in mind is that you want something that will fit in with your other furniture (that is, unless you are completely redecorating). A new wicker double bed frame would look fine with a chrome armoire if you are going for a cosmopolitan look, but it may not be the best idea for someone that is looking to achieve a more masculine aura of décor. And what about upsizing? Measure your room out first. Your larger options are the queen and king, but these will take up quite a bit more space than your current size. You do not want to take up so much room that you are not able to move comfortable with in the area.