This is gonna be a personal tast type of thing. IMHO the fox body mustangs are some of the most fun to drive cars out there. Low rpm torque is lots of fun and the fox body cars are pretty light. The down falls of these cars are the suspension, brakes, and the interior quality which non are all that great but are fixable. They are also faster in stock form than the SN95 cars (except 96-98 cobras but they don't have the torque of the 5.0's either).
I like the SN95 mustang for the better suspension, brakes, and interior even though the interior isn't great I like the style of it. The looks are also ok but when upgraded I think they look great. The 94-95's still had the good old 5.0 but the power was down although some just say that they are just heavier they didn't have as much RWHP as the 87-93 cars stock. If you plan to do some modifications the computers are more sensative. I have a 95 cobra and I really like it but it does have some faults.
I really don't know much about the other cars you listed except the LS1 camaro. These cars are fast and everything but I don't like the controls, the interior, or the styling, not to mention they don't sound near as good as a mustang. They also have a very weak rear end and if any real power is put to them they will explode!!! As for the others I don't know enough to give you a honest opinion but I am not the biggest fan of imports.