Goodman is the best selling residental hvac system on the market today. They are built out of U.S.A. parts asyembled in Houston, Texas. Goodman also offers the strongest warrenty in the industry. Not just equal to thr others but stronger. Example--if the compressure goes bad they replace the whole unit, not just the compressure like the other guys. You wont hear much about goodman becuse they spend there money on the product not adversiting. If you ask a installer that is not a Goodman Dealer you will hear bad stuff almost every time--I call that sour grapes. If you go to the Goodman web site you will find a list of Goodman dealers in your area. OH I ALMOST FORGOT GOODMAN COST LESS TOO. REMEMBER THEY DONT SPEND MONEY ON ADS. I work for a company near Austin, Texas that is a dealer for eight major brands including Goodman. Be sure to get a r-410a system. Hope this helps, GOOD LUCK.
Texas, it is very obvious that you personally profit from Goodman products, and from your HVAC poetic adorations, have drank the Goodman Kool-Aid. I once extolled the virtues of Goodman myself, as the VP of Sales for a multi-state Goodman Distributor. The problem was that I knew better, having represented other equipment in the past. I was acting in the best interest of my personal bank account and not that of my customers.
None of this is to say that Goodman is "Bad" product, but your heavenly description of the grand warranties, reminds me of meeting that I had, sitting with the suits in Houston and hearing them laugh about the actualrial science that went into the decision to announce this warranty with very little improvement to justify. Their reasons for launcing such glorious warranties that are hard to resist were not for the protection of it's end user customers, but was a marketing ploy to overtake #1 Carrier as AC sales kings, with provisions and psychology that said they would not have to honor many warranties. Goodman is OK equipment, but does not stand the test of time regarding structure and integrity of many competitive products with lesser warranties.
Now, a statement for the OP:
The tax credits are great in comparison to past programs, but weigh this carefully. To gain the max $1500, you do have to step into a level of equipment that is higher. If your home is older and lacks the insulations that new homes have, the efficiency savings from say a 14 SEER AC / 93% furnace - to the Tax Credit 16 SEER/95+, may not be as substantial as you would think, and the money spent to attain the Tax Credit, may take years to justify. But, if you are of the mind that you want the best, $ be damned, go for it. I had a customer last week who ened up spending $2,100 to get the $1,500. I did my best to show the comparison, but they wanted what they wanted. I think homeowners should not look at the tax credits as a way of saving total money, but more a means to an end to upgrade to a higher level then the normal budget will allow.
Very good luck to you with your decision. And as others have said, do not forsake a good instalation to drink the Kool-Aid of a contractor offering lower quality equipment and installataion for the sake of the tax credit. Use the tax credit wisely and take advantage of having the ability to step up the quality.