I love my TC3. Pure and simple! There are lots of hop-ups available, too. Check the parts availability for each brand car in your area - always important. I have heard some horror stories regarding the Pro3. But hey! It's all personal opinion.
From what I have seen, and this cracks me up, so many people in this hobby feel that if the chassis doesn't look 'Wild Man' (X-ray, Schumacher, etc...), then it isn't such a great car. Rubbish! Check the mags, the races, etc... You will always see TC3s doing well.
Some day, I may want to try a Schumacher, X-ray, or XXXS Losi, but for now, as I learn about driving, etc..., I will 'Grin' driving my TC3.
Being in this wonderful hobby, we all know, you generally spend 40% driving, and 60% tweaking, and tuning. And; some of these brands require more tweaking and tuning than the TC3.
I had an exotic Micro RS4, Pan chassis, and all the bells and whistles. For my 1:10 touring car, I love the simplicity of the TC3. If it's good enough for drivers like Barry Baker, I certainly have no problem owning one.