Smaller House/Equidistant Side Walls Impossible

Basically, what I'm wondering is - In a situation where speakers must be at one end of a long, narrow room (13" x 23") and situated on the long wall, how good/expensive a pair of speakers & related electronics to drive them becomes pointless? My situation is that I'm downsizing to a much smaller home where placement on the short wall will not be possible. 90% sure that any type of false corner type structures won't meet the WAF. I've got JBL L65s but, even at their relatively small size, they may prove too large for the space. Have been toying with the idea of better quality monitors on stands (Dynaudio/Proac/etc.) and adding a sub later if needed but, in this type circumstance, would I be just as well served with something of much less quality due to acoustic factors that I'm more or less locked into utilizing? Musical tastes are heavy on "modern type" (Rock, Jazz, some Country)...Not so much Classical, Bluegrass, Opera, or Rap. Thanks.