Precisely Black Shark, that's part of the reason why right now there is a surge of interest in compound Coaxial based rotary wing designs like the Sikorsky Raider, Defiant and the Kamov KA92. These offer higher sustained speeds increased maneuvering and range although the advantage of the designed maxes out in scale at Kamov's Ka92 which is a large medium lifter almost in the same category as the Hip. Anything above that and it seems to me that the most efficient configuration is a tiltrotor.
Indeed, the next generations of helicopters civil and military will have one big requirement to come closer to jets performance, of course not to such an extent but with twice the range,speed and payload capability and co-axial designs are today a great layout for helicopters to achieve this goals and even having further capabilities to compound or like i think even further with an engine pusher at specific speeds above 300 km/h that a seperated engine would be needed to push it and the main engines can't do the job because they are connected to gearbox and therfore rotors, meaning an adjustment in thrust is not possible with main engines, but can give a much higher potential in speed than pusher rotors, however they have also negative effects and many dificulties to make such design achievable, like significantly highered IR signature and where this engine had to be installed not to disrubt the balance of the helicopter while thrusting the airframe. However not to fetch it to far to off topic but companies are indeed interested in Raider and KA 92 designs and others will go this way most probably, too.
What about the Westland Lynx?
Maximum speed of 324 km/h beats the Chinook by 9km/h
Actually the westland Lynx has set a record of 400 km/h in its class and it was a special version, like the most world records are performed by special versions of helicopters or at least altered in specific areas, better engines, lowered take off weight or reshaped or all together.
Another fast heliopter is the S-67 Black Hawk which was absolute astonishing when it was tested in 70s. with 3 records during its time with 335km/h than in closed circuit run with 348km/h and a special version with 370km/h and it was the only Attack Helicopter that was initially intented to be counterpart of Mi-24, a special version with cargo compartment for limited use.