I had 20s on my Camaro, when the roads were smooth, it was fine but over bumpy and uneven roads, the ride quality really drops, (feeling those bumps in the lower back). However 20in wheels do look a lot nicer IMO. They fill in the wheel well nicely which makes the Mustang/Camaro look a lot...
I had this setup but it was a little louder/trumpety than I was expecting and liked.
I ended up going with AWE touring which has been great. It was well worth the money.
I had the steeda h pipe and axle back. Cold starts were supper loud, little to no drone but the fitment sucked. I have the AWE touring now and it's amazing.
Cold starts are loud but doesn't bark like the other setup. It's a more mature low grumble with no drone. There is a little cabin noise...