I think MT6575 will take a while to sell before MT8320, based on experience, normally etotalk.com only posted the new coming phone with high price to attract people's attention, but actual releasing date may take almost 2~3 months, so if you are in urgent for a phone, you may consider taking either mt6573 or mt6575 phones. There are several phones I may recommend:
1. G11i:
LINK Etotalk
Pro:
this one with bruno's rom support, become a very stable phone, camera and the design is also good.
Con:
Battery is weak, only last about 1 day or so.
2. Lenovo A750:
LINK Etotalk
Pro:
this one has powerful battery, 2000mah, lenovo original phone, good quality and warranty, MT6575 1G CPU, able to use skype video calls.
Con:
too thick in size, bad design, no flash light.
3. Lenovo A65:
LINK Etotalk
Pro:
cheap in price, lenovo original phone, good quality and warranty, same size of A60, can easy to get accessories, 800mhz cpu, good enough for most of the apks.
Con:
256mb of ram only, and the screen size is too small, no flash light
4. ZTE U960:
LINK Etotalk
Pro:
original phone from ZTE, one of the two major telecommunication companies in china, high quality, dual sim full active, can answer sim2 when sim1 is on call, 1G CPU and 4.3" WVGA screen, good battery, support GSM+GSM, GSM+WCDMA and TDSCDMA+WCDMA dual 3g, good for business people who travel between China and Europe, because in China, you can easy to buy a TDSCDMA sim card from china mobile. It also has Compass fucntion and dual microphone feather (allows to make clear voice talking in a noisy environment). 1GHZ cpu, supports skype video call.
Con:
it is expensive, and does not support USSD, etotalk said they are working on it.
5. Zopo ZP100:
LINK Etotalk
Pro:
MT6575 1GHZ CPU, skype video call, 4.3" QHD 540x960, 720P Video recording, and design is taking from HTC G20, looking good. Price is acceptable.
Con:
Does not support dual sim full active, company is not as big as lenovo or ZTE, rom resource and baseband update is depending on wheather it will be hot or not.