Newb question

[acritzer]

Hello all. Thinking about getting into blue ray and need a bit of clarification. The issue is, my TV is from the early days of HD, and is a large console projection mitsubishi, offering only 1080i. Doesn't even do 720p.

Now, through HD signals off the cable box it looks great...but would a Blue
Ray player be worth it with out the 1080p?

Also, my set only has DVI, so I'd need a cable to go from HDMI to DVI...then do the digital sound through a optical cable.

Main question: Will the Blue Ray player send 1080i? And, will it be worth it. Thanks!