If you're running ddwrt. just crank up transmit power. I have same router & my back room had 2 bars, cranked up transmit to 150 and now have 4 bars thru lathe & plaster..
What'd you crank it to? I read cranking it just adds more noise and can increase transmit and do more harm then good on these.
Keep the ancient router, get a pack of UniFi APs.
any reviews on them?
this guy looks pretty slick:
http://www.amazon.com/Ubiquiti-UniFi.../dp/B005H4CDF4