so what should i get?

i asked yesterday about vixen hair extensions. the one you can straighten curletc. but my replies were the browns are way to darki definately need a medium brown. so i guess the vixen isnt for me.i like the concept of using heat on these synthetic ones.i am glad you guys told me that they were too dark. thanx. but now what and where should i shop for medium synthetic that is long and wavy? real hair losos its curl real fast.

so poose i was looking at that site. do you know if you can use clip ins with those.i know how to make my own.it shows how to install tape.but i am not sure if you could attach clip in to those.do you know?also how many packages do i need to make 2 .7 inch wefts. i dont need for the intire head.thanx