For me to be interested in an exhaust here would be my suggestion:

Make the setup so that it takes out the rear cat converters but can be easily bolted and band clamped up, don't use stainless steel and just go aluminized as that will DRASTICALLY reduce your pricing, and then do whatever from there on back. Maybe even consider new downpipes with high flow primary cats.

Also, i'm not sure if true dual 2.5" is absolutely necessary as this car is not a big cube v8. If you were going to stay true dual i would say go with 2.25" for better velocity while still maintaining back pressure. Granted the best money saver would be to bring it into one pipe all the way out the back like all other systems.

Do you have any sound clips of your exhaust?

And personally i would like to maintain the stock tips if there was a way to do it.

My biggest beef with all aftermarket exhaust is them preaching about stainless steel. I live in FL and need SS like a hole in the head. And even when i lived in NJ most aluminized exhausts would last the life of the car! I just can't justify the costs. If only i had a mig welder. :-(