Thanks for asking ahead about options to connect your 4 new monitors to your laptop. First off, you can connect one external monitor via the VGA or HDMI port on the laptop. For the other three, we have two USB Graphics Adapters that will work with your monitors. One is the UGA-165 and is capable of resolutions up to 1920 x 1080. The other is the UGA-2K-A which is capable of resolutions up to 2048 x 11525. While the UGA-165 will work with the current configuration, the UGA-2K-A will provide higher resolution options in the event you change or upgrade a display.
The next choice to make is convenience vs. cost. If you plan to remove the laptop from the monitor setup very often or you want to avoid extra cables then a powered hub might be a good addition. We have a 4 port hub and a 7 port hub that will allow centralized cabling and one USB cable connecting to your computer, making it easy to connect and disconnect these three displays with just one plug. Also, a fourth USB Graphics Adapter could be used to further minimize cables is desired.
Let us know if you have any other questions we can help with!!
Hope this helps,