Connecticut is one of the states that does not allow direct sales of vehicles, according to the wiki article I normally reference when looking at this. This means you likely have to pay ahead of time, unless you are leasing.
Based on what you have posted here though, I personally dont think you should go through with the purchase. I do not think the ownership experience is going to meet your expectations. Its not that I think you have unreasonable expectations, but the purchase and ownership experience are different from other companies, and the purchasing experience is one of the easier parts.
If you dont like this purchasing experience, and you think the car is average, and are talking about "$60k car sold in china for 40k" when its actually $48k car sold in china for 42k" (based on conversion rates I am looking at right now), I think it shows that you dont really want the car but feel you "need" to buy it for some reason.
The ownership experience is going to be a bit more challenging than the purchasing experience, if you ever have to engage them for service. This is not ment to be anything but a dispassionate opinion, not any sort of indication of anything other than I am a firm believer of not every product is right for everyone, and there is nothing wrong with that.
Anyway, you will need to pay ahead of time based on Connecticut state laws. How far in advance I dont know. I would personally pay as late as possible (well, in CA we can pay on pickup, and thats what I did).