the best version of dd-wrt for wl-500gpv1

[mons]

Hi.
I have bought asus wl-500gp v1 and i want to get a firmware other then original asus.

What I want?
1) I want to use USB, but if it can i dont want to install system on usb. Can I install dd-wrt mega witout USB drive?
2) I want to have iptables
3) I want to share printer connected to the router ( i think CUPS)
4) I want an USB connected to share files (i think SAMBA)
5) I want an web interface for statics.

I don't have any knowlage about loading a firmware, but howto's and other FAQ'a can read and do what i have to do.
Help me to choose the best version of firmware (dd-wrt VXX or others).
Thank you for advices.

[ayasystems]

At first dd-wrt.v24_std_generic.bin

dd-wrt.v24-12250_NEWD_mega.bin

Regards...

[vinyols]

The best firmware is Openwrt in this momment Kamikaze.

All firmwares based in this firm