I see no problem with that, newman.
Just don't buy one with tzitzit already on it and remove them. Tzitzit are Holy items and can't be cut or destroyed in any way, G-d forbid. I think they sell the tallit without them on the internet so that people could tie their own if they wanted to. I know because I tied my first one when I became religious (so it meant a lot to me).
How are tzittzit removed if it is to be worn without being attached to the tallis?