please which linux distros is recommended to build router?

though i am newbie but i want to build my own router below are some linux distros for buiding router which i copied from an online forum and wish to know from experienced users in this forum the one that is preferable, has good network/load balancing ability and filtering plus user friendly.
though am beginning to like pfsense...

Some of the basic *nix router distros....

IPCop...one of the more popular ones, has a big development/support community with lots of add-on packages.
www.ipcop.org/
You can add UTM functionality to it with the add-on called Copfilter
www.copfilter.org/

m0n0wall
m0n0.ch/wall/

Smoothwall
www.smoothwall.org/

pfSense...originally built on m0n0wall...with stronger QoS features
www.pfsense.com/

Clark Connect is a cool distro for a small business, sort of an open source *nix version of Microsoft Small Business Server
www.clarkconnect.com/

ClearOS a further developed fork of Clark Connect....another open source version of Microsoft Small Business Server, UTM, file/print server, e-mail, web, myphp. Very nicely developed.

www.clearfoundation.com

BlueOnyx..another sort of all in one, web/mail included
www.blueonyx.it/

vyatta
www.vyatta.com/

Zeroshell
www.zeroshell.net/eng/

For some of the UTM distros....in addition to the Copfilter build of IPCop listed above....

Endian...one of my favorites..built on top of IPCop..with the features of Copfilter...bundled into one tight package
www.endian.com/en/community/

Comixwall (Project terminated Dec '09 after dispute with BSD)
comixwall.org/

Astaro
www.astaro.com/
A very nice UTM package, recently released a full free version for home use.

Untangle...this one is fantastic...I've built a few...using them in production...very powerful. Lots of features...even blocking of IM traffic and peer to peer traffic.
www.untangle.com/

eBox
ebox-platform.com/
Similar to ClarkConnect...quasi server duties

Gibraltar
www.gibraltar.at/
A UTM appliance, aimed at businesses but they have a free open source community version for home users.

IPFire
www.ipfire.org/en/index
A basic firewall aimed at new users, easy setup, etc.

GnatBox Lite ..free for 2 users
www.gta.com/products/gblight/

my God!!! I cant find UNTANGLE and ENPAQ on your list

ok now I can see my baby UNTANGLE

@ sose if you so much love untangle then what do you have to about this www.pfsense.org/index.php?option=com_con...;id=40&Itemid=43 ?

yeah pfsence is cool , though untangle cant most of the features

then check ENPAQ but they like money

I tried Vyatta. It has a command line interface that is some what similar to Cisco's and also a GUI interface. The software can be run on either a PC or Vyatta's own appliances. They have a good number of business customers worldwide including Toyota.

I also heard good news from a friend regarding untangle.