I went through a lot of this before, end up i went to One Utama Shopping Mall in PJ. Inside Parkson, there is actually a section for curtains. I thought it's going to be expensive, but in the end the cost is very reasonable, and quality + workmanship is superb. I recommended my sister the same, and she was happy with that too. Strongly recommend.

Total cost RM5,500 including installation etc
1) Master bedroom curtain
2) Living Hall curtain
3) Roller blinds for x3 bedroom windows
4) Blind for Kitchen window
All of premium quality, not the cheaper options usually get in fair..