With good use of EQ you can get an even mediocre set of loudspeakers to supply spaciousness. If you take several measurements (one enclosure at a time), mostly off axis (to 10, 20, 30 degrees both ways at least and maybe one at 45 degrees between the pair), and average the responses ... killing any major peaks in each loudspeaker, you'll eventually get a nice smooth reflective response that will match the on axis response (in shape) pretty well. The coloration pretty much goes away (the 45 degree shot between the pair will reveal this). This works well in reflective rooms. Ultimately, your on axis response may not be exactly flat anymore but the overall in room response will be real close. As a last measurement, I'll take one where the loudspeakers responses cross (mic pointed at the front wall). You should see a nice downward trend in both left/right responses as well as the combined L/R response.
Takes a little time but IMO it's worth it. You'll be able to hear the same tonal response no matter where you are in front of the pair.