6 feet is not near-field and not quite far-field. The main reason to use big speakers is to get accurate bass reproduction and to achieve realistic higher SPL levels and a more natural presentation (think headphones most unnatural as no reverberant field and small near-fields as in between and large speakers in far-field as most natural sounding balance between primary and reverberant sound).
The main reason to sit near-field is to hear more primary signal and less room reflected response. Studios will often mix on near-fields (for precise mix decisions) and then use main monitors in far field for bass checks and to impress clients.
The main reason to sit near-field is to hear more primary signal and less room reflected response. Studios will often mix on near-fields (for precise mix decisions) and then use main monitors in far field for bass checks and to impress clients.