I purchased a 10A last week and I have the red seats, love the look. You can also get a Rubicon 10A with black seats, you do have that option. I have the Anvil Clear Coat with the automatic trans. and seems very fast with the 3.6L engine. The 3,6L is set up with cylinder deactivation so there is that slight throttle lag when you work the gas pedal, but I think in time I'll get used to the slow throttle response.
You can rest assure that the 3.6L engine will be much faster than your manual shift 2004, you just have to get in or on the throttle.
The unlimited 10A is a beautiful looking rig--get it!