You can make the bezels alot smaller by overlaping LED monitors because their really thin.
Or you could mod some monitors together by removing the stock bezel, place screens next to each other, and fabricate your own to block bleeding backlight.
This site makes them for you
http://www.9xmedia.com/new/products/xtops.php
Below is what they say about one of their products
THE 9X MEDIA X-TOP: Top-of-the-Line Best-in-Class-By-a-Mile, USA Designed & Machined by 9X Media
Ergonomic – ease of use, flexibility in positioning to individual preferences in height, rotation & angle
Eco-Friendly – USA-machined of 100% clean recycled Aluminum, engineered to be lubricant-free
Upgradeable – grow from 2 to 20 screens and upgrade features for iPods, AV, KVM, audio switching and power control
The X-Top Scalable Multi-Screen Display System, the first and only multi-screen solution designed, developed and made in the USA, made its debut in 2001 at the Siggraph tradeshow in Los Angeles, California. Since, it has become the gold-standard of Multi-Screen desktop displays and today it continues to define and set the standard for multiple monitor innovation. Mix & Match Screen sizes / Upgrade to Multi-Media - Easily Combine Landscape & Portrait Mode Achieve your perfect X-Top Multi-Screen choosing from 19" to 32" screens and then position in Landscape or Portrait Mode - The X-Top is Always Easily upgradeable & Expandable.