Thanks guys for all the help and suggestions.
Got the Asus RT-N13U and it was a breeze to set up. Range is not greater than my old g router, but speeds are
1gb transfer from wired to wireless client
2:25 same room
3:00 from my room which is 2 walls and 20 feet away from router [this is what I had measured with my old router and would take about 12 minutes]
Wireless to wireless, same room 5:30 for 1GB transfer but repeat showed 4 minute. Don't know why so much variation.
Still my favourite armchair has scratchy connectivity, so am looking at options to increase the reach, either by shifting the router to a more central location in the house, or by getting a repeater.
By the way my cousin measured speeds of the Airport, and he got 5:40 for 1GB same room wireless to wireless, so the Apple is about the same speed as the Asus.
Would these be what I should expect? Or should I re look the settings?