Dia Zerva by a mile! Check out her girl/girl clip store, she has some great kissing scenes and it's obvious she enjoys it.
But I'm sorry to say we've been barking up this tree for a while and KMG just seems to be afraid to break their original mold and let the MILFs in. It's a shame.
Dia Zerva would probably be my choice here and I would pair her up with Daryl Hanah. Violet isn't too bad but kelly and Melissa do nothing for me. That 3rd pic of Melissa is horrible, man. Melissa has admitted to being more of a lip kisser and, in my opinion, tongues are very important in this type of site.