Bigger rooms are almost always better, but shape is more important. Recommend reading Floyd Toole's "Sound Reproduction", 3rd edition.
The Daelalus speakers are made for large rooms. Multiple tweeter/midrange driver designs like Ulysses or Apollo 11 mandates a far-field setup for good driver coherence (9 feet is recognized as midfield). Your current room is nearly a 1:2 proportions - very bad for bass echo, but square would be worse (depending on alcove/kitchen arrangement you might get just that - please provide a sketch). How tall is the ceiling? For a room this size 11 - 12 foot would be ideal. Sitting farther from back wall would also be helpful as walls reinforce bass.
Controlled directivity is a speaker design concept gaining acceptance that minimizes side wall interaction of mid/high frequencies, currently used by JBL, Amphion, Buchardt, Kii, and Dutch & Dutch. Again read "Sound Reproduction". In it Toole recommends multiple carefully dispersed subs.