We own a 2015 Audi Q5 TDI, and the 3.0 V-6 TDi motor is absolutely sublime! SO much torque, and with no disrespect to your 4-cylinder TDI, the V-6 is in another uinverse altogether with regards to sound, refinement and power.
Should be a buyer's market right now, as there's still no official response from VAG regarding the final disposition of these vehicles, so if you can find the right deal, I say go for it.
FWIW, our Q5 has averaged 31 mpg in 30K miles, and it will tow 7700 lbs. A friend's Touareg is averaging about 24.4 mpg overall, and is nothing like as quick as our Q5 - nor is the warranty as good.