it's better for u to book earlyer bcoz every hotel will increase they price once the date nearly to yearend.
I can suggest u go to Citin Hotels in Puduraya. I stay there before for holiday, is kind of budget hotel with room rate aroung RM99/night.
I like it because the location is strategy enough. it's located near to LRT station, bus station and also bukit bintang which is the most happening street.

I know there are penty of hotel nearby bukit bintang in better location but the hotel around there quite expensive.
I recomment this Citin pudu hotel is beside the price much more cheaper and rooms are new and clean, actually the location is not too bad which is jst 10 minute walk to china town, and to reach bukit bintang is walkable around 18 minutes walk, and a long the road u can find plenty of interesting place such as some plaza and restaurants

Actually in finding a nice hotel and yet nice, we can get a special rate in many way. Beside check out on newsletter that sending by the hotel,we can get a special discount on the company’s facebook page. I found out some hotel doing a promotion by giving promotion code, but not much people know about it such as:
•Legacy Suites Bangkok check on “compasshospitality”
•Citin Pudu, Kuala Lumpur check on “Citin Hotels”
•Citrus Hotels,Bangkok Check on “ Stay at Citrus”
Check it out, hope it useful