Pls comment on the followings, for a girl with height 150cm and not too strong arms.
Target to train up for more precise sweet spot hit and control. Power can be moderate.
I wish to get a racket from those relatively new series and carry it through to Pro levels so I don't need to change racket too soon.
When I started taking tennis seriously, I used an oversized racket (Prince Game Warrior DB OS). Now that my techniques are much more sound, I now play with what you call "pro level" rackets (e.g. Wilson KSix-One, Head Microgel Radical). But every once in a while I still play extremely rubbish, then I'll take out that oversized racket, and I'm back being Superman again.
In my opinion, a beginner may play with an oversized racket. Even Andre Agassi who I think is one of the all-time greats, plays with an oversized racket. Of course, his racket is what people would call "an oversized player's racket".
Among your choices, the Prince is the best, I think. Its specs its a standard "tweener racket": 100 sq in head, not too heavy, not too light, slightly head light. Plus the O3 speedport technology should help you find the sweetspot more often. The KPro, according to its specs, is a very strange racket; looks like it's suitable for someone who has a western grip, whips the racket quickly and put a lot of spin - someone like Rafael Nadal (or scaled down 100 times for an amateur). Although it's light, light rackets aren't always good. The lighter it is, the less power you can put to the ball. But heavier it is, the harder it is for you to swing. So you have to find the right balance. For pros, they have no problems swinging because they have all the right muscles, that's why most of them play with rackets over 330g heavy.
I don't quite like the Babolat you suggested because it's way too head heavy. Some pros like playing that kind of rackets but the head-heavyness could affect your normal swinging (help or harm, either way it's not so good). Since you're still finding your own way to swing, head light rackets are much more maneuverable in that department.
With my oversized theory incorporated, I would suggest the following:
Prince OZone Seven
Prince O3 Speedport Red/Blue (or White as you suggested)
Or if you want to kick it up a notch, why not the Head MIcrogel Radical Oversized? Actually I myself want to try my hands on this one recently.
Most Prince rackets have a dampened feel which should help you a lot when you're a beginner. Most Wilson rackets, on the other hand are crispier feeling and can kill your arms if you're not quite sure what you're doing.
If money is an issue for you, you could actually try Prince Shark, either the midplus, or the oversized. They are on sale. The Shark is a classic, and can either be a beginner's racket or a "pro level" racket. Even Maria Sharapova used it to win her first Wimbledon when she was 17 (although how she customized her racket is another story).