Recommendation on buying a chair.

Hey guys,
Looking for recommendations on buying a chair.
Requirements:
1. Budget: 10k-20k(Max).
2. Proper lumbar support(my height 185cm)
3. should be comfortable for 10-12 hr sitting per day.
4. should not disintegrate like the leatherette material.
5. Don't care much about aesthetics.
TIA.

Yep, it's my office chair but is quite out of my budget. Also not used.