Our boats are similar in size so my application may be relatable to yours. Our older Dometic 12K BTU unit is noisy and it resides in the port-side lazarette. We sleep in the aft cabin and I can't sleep with it running. It's too loud. Fortunately, it's very rare when we need to run the air over night. We usually cool the whole cabin down before sleeping and then shut it off. We have 2 vent ports and they are basically the shortest distance possible. One vents into the aft cabin and the other vents through the galley bulkhead. It's plenty for cooling the entire cabin down. I suspect that I would prefer this arrangement for your v-berth sleeping area. You may want a 16k unit to make sure the v-berth cools down. I suspect that I would not want the unit anywhere close to the sleeping cabin, even with your climate. On the very rare occasion that air c is needed when sleeping, I can sleep in the saloon and not mind the noise volume. Also, if it is really hot, we shut the v-berth door just so we aren't cooling our "garage" unnecessarily. We can also close the vent into the aft cabin, which is what you may want to do, too.
Long story short, if the noise makes it difficult to sleep, I would put the unit in a location that isn't right next to your berth. I think you can get a unit that will cool down the space regardless of the location.