Actually, Id suggest a new Civic.
You can trust its crumple zones & airbags as well as all other components of the vehicle as you're getting it brand new. In an Accord, you will actually never really know the condition, if its been wrecked, totaled, abused, etcetera.
Petrol is at 87/L You want the most km/l right? Civic 1800cc promises you more km/l than an Accord 2000cc which is bigger & heavier. Also, maintenance is substantially less as its a local car, and parts like filters, plugs, oil & fluids as well as body damage repair will be a lot cheaper.
Civic is great!
It got awards all over the world! Its beautiful, smart, fun & techy. Go for it!
Though if what you really want is a CL7, who am I (or anyone) to stop you? Get it!