The Aero chassis car will be a delight. That car looks great as well.
There should not be an issue with the power dominating the experience as the Aero chassis is a generation forwards and can cope with it. Wet roundabouts might be the exception to this of course and there is a doozy up the road on the test drive they typically choose. Initially the steering wheel can feel a little bit treacle but you adjust very quickly.
The autobox when left in normal mode is quite relaxed. Do the first part of the drive in normal staying below 3500 rpm then have a go in sport and use the 4000-6500 range and see the two sides of it. The big lazy torque at low revs makes it great to have a quiet drive as well as belting along like a stabbed rat when the mood and roads permit. When flipped to sport the autobox becomes more fruity and you can press on. Wheel paddles and the gear lever tip-mode allow you to take control and this is actually quite pleasant.
The B&C car does appear to have standard exhausts in the pictures. Sport with rear exits like Peters gives it a good blare or the dual side exhausts rock parked cars and vex neighbours early in the morning when you go for a blat. Do hear them both if you should make a change as they have very defined differences! Subtle and Hoodlum spring to mind.
Aero's are quite a step forwards and make the cars quite a bit more practical to use. The ride is generally better as well as the grip/balance/handling so you can do the miles with less concern.
Don't forget two things.
1.Breath, don't forget to breath.
2. Haggle! You will buy it but don't let the volume 11 experience overload sensibility.