As much as I like my 8P a3 tdi, I am thinking of, in a few months, upgrading to a TT Quattro Sport (in black, i like subtle). I would need to spend around £9750 to get a good black 40k mile one thats been looked after. My car is worth around 5k, so wont be too expensive of an upgrade, so will buy it in cash. I am wondering what is going to happen in the form of depreciation? Are values going to massivley drop soon, I dont want to buy one for £10k to find they are only worth £6k in 12 months? Also, as a quick check, is the QS any different to the 225 when it comes to big turbo kits? Will it be a problem if I came into some cash and decided to fit a gt35R or something like that?