Best Blu Ray With Upconvert Blu-ray Or Upconvert DVD Player?

Blu-ray or Upconvert DVD player? - best blu ray with upconvert

We have a Samsung 42 "720p DLP and currently has a basic DVD player. I wanted to spend, a Blu-ray or DVD upconversion. Because the TV is 720p is an advantage over Blu-ray conversion. Could a Blu - play-ray DVD standard?