$25k?? Ouch. That car with every factory option only has a TMV of $22k. You either bought everything from LoJack to Undercoating or you got screwed.
Now I compare a Hummer to a hybrid and make the argument that a hybrid is better, but lets stick to apples to apples.
2004 Honda Civic Hybrid Edmunds TMV $20,700
2004 Honda Civic EX Auto w/o Side Airbags Edmunds TMV $$17,700
Now the $2,000 is a tax deduction not a tax credit. So assuming 30% tax bracket your talking about a $600 savings on tax. That maxes the difference in price to be $1,400.
Now lets look at the cost savings of the gas:
EX city MPG = 30mpg
Hybrid city MPG = 60mpg
Lets say 15,000 miles per year.
EX gas cost 1 year $750
Hybrid gas cost 1 year $375
Thats a 375 savings. At that rate you will have to drive the car 6.4 years to break even. Thats 96,000 miles. Doing highway miles its even worse.
And lets not even talk about unkown maintenance costs. The guy at the dealership wouldn't even tell me how much it would cost to replace the battery or service the regenerative breaks.
Have fun with your hybrid. Personally I'll be waiting for fuel cell vehicles. (and probably waiting a long time)