HD streaming is a
dicey proposition for any wireless solution.
As for range, effective throughput is as valid a measure as signal strength. In that respect, the 825 is at a disadvantage by having less antennas to transmit with. I wouldn't discount the Linksys unit just yet. Fortunately, the 610 was tested with the current "open air" methodology, so it should be easy to gauge ranged performance between the two.
Have you considered connecting the laser printer to your PC and just using a network share?