WPA is CURRENTLY as good as it gets for the mass market home wireless encryption that comes straight out of the Windows Mob Box, so to speak. Of course you can purchase additional third party Wireless encryptors (generally Commercial purchases only) but then you run into compatibility issues with your access point/router and wireless Nic's... and dont forget about COST... third party generally means NOT FREE... or BIG BUCKS
There are other things to help WPA along to be more secure such as PASSWORD Security... Change the password to your router (and make it long and change it often), change the password to your encryption (and make it long and change it often), change the password to your PC Login (and make it long and change it often), change the password to your... you get the point right
and then lastly one thing to remember about your wireless security.. If an intruder wants in and he is fairly educated in networking there is nothing you can do to prevent him (or her) from getting in
(unless you unplug power from the router)
look at it this way... when you deposit your money in the bank, the bank puts your money in a safe. This safe deters normal Joe Scmo from walking in and grabbing your money right... But if an armed gunman with a psychotic mental problem runs in and shoots everyone then he can walk right in and take your money from the safe. and that is pretty much the purpose of Wireless encryption.
All you can really do with wireless encryption is keep your neighbor from stealing your bandwidth... so Wep, WPA, or even a mac filter will work for this.