I am a total Obitsu junkie! I had to put in my 2 cents here. I have seven of the big Obitsu's ( 2 60cm ball joint style Haruka's, a 3-part Obitsu boy with older joints, a three part Obitsu Gretel girl with older joints, a two part Haruka with older joints (Haruka fullset!!), a 55cm Hensel - he has ball joints, and a 50cm standard with a Haruka head,) It's the Haruka love at my house!
In my opinion, girl Gretel heads look best on DD2 bodies. For some reason the proportions just fit. I love the Obitsu 60cm ball joint torso and chest - it's my favorite (see Hazel). However I also really love the oldstyle joints for the poses. And don't forget - Obitsu have option hands!
If you want Kitty ears that can be used without modding your doll, my husband makes them and Junkyspot sells them! They come in small, medium and fox. The smalls are usually used on MSD, and the medium on SD, however they can work on anyone!
I was fortunate enough to see K2's lovely ladies in person, and they are awesome!!! You do want one like his, really. The Japan only dolls have awesome skins. Personally I do think all the 50cm dolls I have seen are wonderful, and I wouldn't trade Peri for anyone else, but those Yamato dolls are unbelievable!
The 50cm dolls wear Goodreau MSD clothes very well except for the shoes.