Which version of TomatoUSB?

I bought a WRN3500L router and I would like to add Tomato firmware to take advantage of primarily QoS since I have a voip phone line, and use regular internet and p2p, monitoring, logs, bandwidth, DNS, DHCP, VLANs, and gig ports. I do not care about VPN feature or USB though. I cannot find anything concrete around here as I have searched for it, but I would like to upgrade Netgear's firmware with latest Tomato that would offer me those options. Any help is appreciated to which firmware I can use. ALso do I need to install DD-WRT Mini to upgrade to other latest Toasman's firmware? Regards