I used to own a toshiba 5109, a panasonic rp91 and now have a JVC sa75.
I would recommend the JVC over the toshiba. I think the build quality is better and based on everything I have read the past week (while researching players), the JVC performs better than the toshiba.
Presently I have an older 36" rca tv with only rca & svideo inputs. I will upgrade my tv, but I want a player that will give me a good quality picture now & later.