Anybody recently upgrade new Airport Express from Older versions?

[Blazer5913]

Hey guys, I was streaming some wireless content to my ATV2 last night (I have Plex installed and set to stream at 4mbps, the "highest 720p" available) and was constantly getting buffering messages and pausings. But on the ATV2 I have hardwired in my living room, everything is fine, even with the streaming set to 10mbps. So the wireless connection must be the problem (my speedtest.net on my wired iMac gets around 25mbps download), and I have an older generation airport express wall-plug (still N router though) connected to my comcast modem that's serving up my wi-fi network. Would I see a huge jump in my wireless signal/speeds if I upgraded to the new model. I do have lots of devices on the network (iPad, iPhone, Xbox 360, etc) so the dual band must help that. I also live in a small apartment so range isn't a huge issue but still not getting a "full signal" on the wireless ATV2 in bedroom, so added range would help as well. But if you've recently upgraded, are these claims true in the real world? Thanks guys!