Streaming HD Video to PS3 (wireless)

BACKGROUND:
So I've been backing up my blu ray collection on my PC and I'm interested in streaming the videos to the PS3. I've been encoding the blu rays to MP4 and the average bitrate is probably around 7-8 mb/s. My PC is connected via ethernet to my Linksys wireless g router and then the PS3 is connected wirelessly. Running ethernet to the PS3 is not an option, so it must be done wirelessly. My wireless G router just hasn't been cutting it for HD streaming, so it's time to upgrade

INITIAL THOUGHTS:
I'm fairly certain that a PC --> Wireless N Router --> Wireless N Bridge/Game Adapter --> PS3 via ethernet is the way to go on this. There isn't much in the way of other wireless networks in my heighborhood, so I'm fine with 2.4ghz opposed to 5ghz. Either way, the PS3 will be less than 40 feet away from the router with a wall in between.

Also, both the PS3 and my PC have gigabit ethernet ports.

QUESTION:
So my question is, to maximize network throughput, do I need a router and bridge with gigabit ethernet ports instead of regular 10/100 M? It seems to me like a 300mb/s Wireless N router should always come with gigabit since the 10/100 M port would just botteneck the connection. However, I've been finding lots of routers and bridges that are both Wireless N and only 10/100 M. Is there something I'm not seeing here?

Regardless, I know in all reality that I'd be lucky to get 100mb/s via wireless N since the 300 mb/s is only theoretical. Also, I probably won't need anywhere near 100 mb/s for my streaming needs. However, I'd like to future proof my setup as much as possible.

So, should I pay the extra for gigabit ports on my router and bridge? Will the difference even be noticeable?