Antec put some brains into this one, learned a few lessons from their other products.
What you have here is a Sonata family member but with the best airflow in the family. It has the side of the front bezel drilled for much much improved airflow. You can stick some serious fans in there for great airflow. Think of it as a cross between Sonata and P-series :laugh:
Better PSU, NeoPower 550W (very good PSU), upped from Earthwatts 500W as in my Sonata III.
They are very quiet cases, no problem there.
Overall, good deal, but i would do a little more research if i were you:
I know for a fact that you can find the Rocketfish case for as low as 50$ (contact Aigomorla or Theplaidfad for more info on where you could find one) It has way more room than the Sonata, way better airflow, way better design, extremely quiet (just like the sonata), you'll be extremely well pleased!
That leaves you with an at least extra 100$ to spend on the PSU... Think about it!