However, don't let this isolate you from the other in the future. There is always room for a DJ who can work with both mediums. Some styles are easier to get on one medium than another. This is especially true of underground dance music. If you find yourself spinning a lot of rave oriented material, you may have to move to vinyl simply because most new releases come out on vinyl first.
Every style has their own preference of medium.
Choose the one that best suits what you want to do. This ties in very closely with style. It may be harder to find Ace of Base on vinyl than on CD, but it is out there if you look hard enough. This is where most people get separated in the issue of Vinyl vs. CDs. Each has their own benefit.