The Asus model has 20/40hz option and it is Dual Band and more reliable he said. I was going to buy the WR1043ND but realised its not a modem, just a router. I wanted to replace the Telecom router because it required a restart every few days to be alive.
Went and bought ASUS dsl-n55u for 198 from PB Tech, the sales person convinced me I dont need another repeater and would probably make this work for the whole house because its Dual Band and has both 2.4Ghz and 5Ghz
Setting up now
sales person said that to get a sale.
5GHz is useless between rooms, and the 2.4Ghz may or may not be better than what you have. With the antennas it will probably be a bit better but I doubt you will see decent speeds at the other end of the house.