I noticed on Embraers web site they have/are developing a new 195sx with upto 135 seats , and they state its aimed as a direct replacement for 737 classic/A319 aircraft. I wonder how popular this option could be with such a large worldwide potential market.
They also seem well poised after all the sales of 170/190's to emerge into this market. Embraer may have quite an oppertunity here.