I'm a strict "meat is meat and i will take no substitutes" kind of guy , however I have on occasion tasted so called "soy schintels" or TVP and found them to be acceptable when it comes to taste and texture. It does actually taste like meat, what does betray it's nature is the lack of fat ,mostly.
http://en.wikipedia.org/wiki/Textured_vegetable_protein As the article says you could mix it 1:3 with ground meat and not tell the difference.
Again , i like my meat , however if you're into replacing part of your meat intake with anything vegetable that's the most "meat like" product i've found. Tofu's just horrible.