Use WPA if you're not going to be really needing the speed. I use WPA, for my clients and myself, no problem.
Your clients, how old are you? I was under the impression you were a younger kid still in school, no offense of course.
In all honesty, a lot of people will tell you WEP is insecure, and well it is to a certain extent. There are known crackers out there that will allow you to eventually crack into the encryption, but that doesn't allow them access to anything but your router, and if your router is password protected they would have to crack that as well. Which is all accomplished with ready available downloadable tools.
However, really, I want to say 95% of people who tell you this wouldn't know the first thing about what to do after cracking the encryption. I, myself have tried to crack WEP and even though I was successful doing it, I never gained root access of a secured system remotely. It is A LOT harder than it sounds.
However, since setting up WPA and WEP take about the same number of steps it would be more wise to configure your wireless network with WPA. WPA is still vulnerable to some various forms of attacks, but so far has not been cracked yet. Not to mention somebody would really have to want to get access to whatever it is you have to cause all the trouble of tracking down your personal address, sitting outside your home, and attempting to hack into your network. I would say if anything, the most likely culprit would be some punk 12 year old kid who read online you could hack wireless networks, and would probably never gain access or cause more damage than good. The latter reason being enough to secure your network I suppose.
No matter what your wifi AP is constantly broadcasting packets. The only thing the SSID does, is give your network a name so that any clients searching for connections can pick it up. Even taking out the SSID does not hide your wifi network from a stumbler. Having an SSID is probably fine. I would say for the most part if it is a home network just putting up any kind of encryption is good enough, but if you have support for WPA you might as well use it considering it takes the same amount of time and effert to set up as WEP.