Since it all depends on your unidentified TV, we can only give you advice on what to look for. Also you hardly want "two red/white outputs to tv", so I'll assume you want to take the sound from the TV to the 2.1's inputs.
The audio outs are the normal connection since the headphone socket always has a controllable level. Since your amp will also control the volume, the resulting double attenuation can be problematic. Also headphone sockets tend to be on the front or side, which may be aesthetically undesirable for a permanent connection.
Some TVs have a variable level output, others have a fixed level output, some are configurable (like mine). Some TVs allow the internal speakers to be disabled (like mine), others don't. Some TVs automatically cut the speakers when a headphone is plugged in, others don't, and yet others are configurable (like mine). Your TV's manual / on-screen help should answer the questions on what can be done, after which you can determine the better connection.