In your original post you said you were trying to save $. If you go any lower than 1.4"ish you will need struts. Maybee you should wait and save some $ so you can get your car to look the way you want it to. I dont know about Tien springs and I havent heard many people reccomend them on this site. There is a reviews section that may have some info on allot of the brands.
Good luck.