Here is iDivide's review of affordable office chairs. If you are on a tight budget, but still want high design that is modern and minimalist for your office decor, then you will like the follow product recommendations: #1 Think Chair by Steelcase:
Steelcase Think 3D Knit Office Desk Chair Black Frame 4-Way Adjustable Arms and Adjustable Lumbar Support Blue Jay Fabric with Hard Floor Casters
Ergonomically contoured ultra modern design for all day comfort. Soft and breathable German poly-elastic mesh seating surface. Generous seating area conforms to your body and supports posture while sitting straight or reclining.
#1 Rated mid century modern office chair from Laura Davidson. 400 pound weight limit.. Heat embossed ribbing like the original - 3x more durable than cheaper stitched ribbed versions. Supportive chrome steel tube frame; ribbed leatherette seat with cast aluminum arms for comfort.
The office chairs above are all available on Amazon. We think this selection of office chairs represents a good balance between modern style, quality and an affordable price.