The Tartan 40 is worth considering although is has a spade rudder, but otherwise a strong performer, Sparkman & Stephens design. Tankage is a little on the small side but two separate double cabins plus three berths in the salon, separate shower, can be had for a little over 100K.
Many new "bluewater" boats today have spade rudders............
Ah, sleeps 6 (2 very familiar couples and 2 which will be sleeping in living spaces). I read the OP as needing 6 berths, as in physical bunks.
If OP needs 6 berths in cabins without using the main cabin the only option I know about in 40' would be a cat.
Don't know of any monohulls below mid forties with three sleeping cabins. Even those are all three doubles so if you have a pair in the crowd that isn't a couple they would at least have to be very good friends.
The water is always bluer on the other side of the ocean.