t-7 is supposed to be the better and more visual version of t-2.
By no means. I am actually looking to get some 2c-c. The dose response curve is lower than a lot of the other 2c-x's, so finding your perfect dose should not be an issue.
In all honesty, I do not know much about 2c-d.
2c-e is really not that visual imho. The psychedelic effects are of a very mental nature. I have had trips so smooth that I had no idea I was tripping until a few hours in when I had mad crazy CEV's.
Start small and work your way up. 2c-p is supposed to be incredibly potent.