Does your current monitor have a DVI hookup?
If so something like this should work...
http://www.newegg.com/Product/Produc...-113-_-Product
If it's got VGA only there are adapters, but they're hit or miss from what I'm told.
Otherwise any monitor with HDMI should work fine. Are you looking for a certain size? Touchscreen or no? Any resolution requirements (2K, 4K)?