Also, would the IXOS 171av cable be about as good as the 1713? I ask because both are availible at accessories4less.com but the 171av is .5 meter(20in) and $17.99, while the 1713 is 1 meter and $39.99. All I need is the .5 meters, and I know that shorter is better, so I figure that since I'm on a budget I might do well to get the 171av. I don't know cables very well, so any advice would be much appreciated, thanks.
The former is specifically a 75 ohm video cable while the latter I'm not so sure is. Over the lengths you're looking at and the fact you'll likely be going DVD > TV or something like that, it's a moot point. The primary reason as to why it's a moot point has to do with in order for impedance (75 ohms or not) to be a factor, the connection has to be ~ 1/4 of the wavelegth of the signal being transmitted. If we were to assume your DVD player was going to be passing a 50 mHz signal then that has a wavelength of about 20 feet. A quarter of that is 5 feet. 1/2 meter is about 1 1/2 feet. So there's no reason why you couldn't use it. However...people agonize over everything hence the reason why quite often 75 ohm cables are chosen.
One of the disadvantages of a short length is that it locks you in to component placement. I don't see this as such a big thing. After all many people have a tough time telling s-video apart from component. On practical performance issues, it's hard to make a bad choice. Just keep in mind if you want to change the spacing of things, you won't be able to.