Hey, I found the answer so I am replying to my own thread...
I initially tried setting Wireless Network Mode to G & N, so Channel Width had Full/20mhz as the highest value, and I was getting 65mb on my N laptop.
Although I later changed Wireless Network Mode to N-only, I didn't know Channel Width had new possible values, so it was still on 20mhz, and I was still getting 65mb.
Just looking around today, I found that I can set Channel Width to Turbo/40mhz now that Wireless Network Mode is N-only. Once I applied this setting, my connection jumped to 150mb right away. :smileytongue: