u may have to do a little research on tihs put here is my input to your question.
i would say save the money and do the 245BW. i have the 225BW as one of my monitors on my test bench. and i think (i could be wrong) that the only advantage of the hdmi is that it carries audio. and (once again i could be wrong) the hdmi only goes up to 1080 for resolution. i am doing 19×12 right now. i hope this helps your some.