Is Blue Ray Upscale Better Than Dvd Upscale I Have A 50" Hitachi CRT Projection HDTV. It's A 4-5 Years Old And Has A DVI Port. Is It Worth Getting....

I have a 50" Hitachi CRT projection HDTV. It's a 4-5 years old and has a DVI port. Is it worth getting.... - is blue ray upscale better than dvd upscale

Extend the range DVD player with HDMI or DVI? I have a component connection for some time. Well, my readers that I have bitten the dust started to look around. I'm not even an HD DVD or Blu-Ray at this point.
My TV has a 720p and 1080i, the TV emulation mode. I think it is a form of construction of a large scale. I read that it is possible that extending the current level of DVD players better than my TV upscale So it's worth it, or I get my money and something different depending on the scan - Progressive player.
Thank you!