I would suggest you go for IELTS mate... From your score it seems that u r almost there... Whether u believe or not I booked and appeared for my IELTS in just 10 days time, and guess what I got 8,7.5,7,7 ... Haaa!!! Relieved!!!
This test is more about learning techniques than just a command over English..... But trust me 7 in each component is not that difficult to achieve...
Btw in which component did u get 6.5???
Best,
Bret