You can definately get the power you want from a both. A sc will prolly get you close or just a little under 250. You can bolt a sc on without changing the internals, but you will not be able to run as much boost as you will need to. There are many ways to upgrade sc to get more power but it is better to lower your compression and stengthen other internals. With a turbo you will have the same problem but it will cost you alot more. It really just depends on how much you want to spend and how much you are willing to do. If you are planning on spending alot go with a turbo. You can always upgrade parts in a turbo sys to gain more power if you are not satisfied. Most companies that make cams also make turbo cams which will help out alot.