I've not had much experience of TS so I can't really say.
As for a comparison between CQG and eSignal - they both do the same thing, and the data is good on both. I also don't trade from a charting package - I have a seperate trading application so can't comment on that. I steer towards CQG - if only because it just seems to be put together better, I can't describe it. It just feels 'nicer' to use and is smoover round the edges. It looks brand new, whereas eSignal looks 'old' - If that makes sense. Saying that, the company covers paying for any stuff we need out of our overheads so cost isn't so much of an issue. If I had to pay personally then I'm not sure the 'nicer' feel CQG has would warrant the extra £100 or so a month. I can see why people think it's overpriced.