I would like to mention that staying at the Admiral does not make for an easy or fast transfer to Ballerup which I find should be taken into consideration as it is a work trip.
As for D'Angleterre and Nimb they are not options due to being very expensive.
The Admiral is probably also above budget.

The area around the Radisson Blu Falconer is not boring in my opinion - many shops, a shopping mall and plenty of cafes and restaurants.