Just changing to N only made a massive difference, up to 7-10MB/s! Mainly hangs around 8, still a far cry from the 13-15 it was averaging before. I'm eyeing the Synology 214se which is testing around 58MB/s write which would make me ecstatic, I just want to make sure my network is up to the task to do it wirelessly. I can't change the channels, on the 5Ghz channel it's locked to auto. I'm hesitant to change it N only on 2.4Ghz as I'm 99% sure the PS3 doesn't support it and my son would probably go into a coma. I'm not in a congested area at all so doubt it would be a huge difference. Still going to play with the QoS stuff, anything in particular I should try? After all the work it took to get it set-up with my surveillance system (an E3200 or 3000 running DD-WRT in bridge mode) I'm so hesitant to muck around to much.
Wireless devices are various Apple, Dell, and Lenovo PC's, couple of iPhones, two iPod Touch's, four iPads, a Moto Droid Mini and two PS3's. Lots of stuff but obviously not all used at once.
First of all, there is no freaking way you'll get anywhere close to 58MB/s over WiFi with your current router. Even a top of the line one would top out around 25MB/s over Wireless-N.
Your WD Live Hub would probably cap you at around 20MB/s anyway.
So to me, your new router just became a higher priority than your NAS box.
I would keep your current one in 2.4GHz only mode, let it use all of it's antennae in one band for best performance with the older hardware. Then get a fancy new one like an ASUS RT-AC68U for your 5GHz/802.11ac stuff.
At least then you'll have best-case Wireless-N performance in the 5GHz band and some room to grow as you acquire Wireless-AC clients.
But that's money.
Don't mean to be harsh, but you're basically stuck between a rock and a hard place. Very few WAPs have the oomph to support the speeds you'd like
and all the older hardware you have. (And you do have a fairly large number of wifi devices.)
And if you're in a crowded WiFi area, it's just more annoying and horrible.
Anecdotally: I don't have as many devices as you do, but I have a mixed network of newer and older 2.4-only and 5GHz-capable 802.11g and -n devices. I recently doubled the wifi throughput to my NAS simply by upgrading from a first-gen 802.11n Airport Extreme to an ASUS RT-AC66U. MOAR ANTENNAS!