We are going to need to replace our A/C unit in the near future. It is a 9yr old Heil 12 SEER 3 ton, and has a good amount of corrosion, to the point the fins are flaking off when touched. We live in Southern NJ, about 8 miles from the coast. We generally keep our A/C on from April-October, as my wife likes to keep the house cool and dry. Our existing furnace is a Carrier Infinity 96% 58MVB080-14. The main problem is the coil is only 10-12 SEER, and is below the furnace, so replacing the coil would entail removing the furnace.

We are looking at getting a matching Carrier A/C to pair up with our Infinity furnace.

We have quotes from 3 different dealers. Which of these seem like the best proposal?

Option 1:

Carrier 24APA736 2 stage condenser

CNPV4821 Coil

10 yrs parts/labor warranty included

Carrier Factory Authorized Dealer

$7395

Financing will increase price

Option 2:

Carrier 24ANB736 2 stage condensor

CNPV4221 Coil

10 yrs parts

1 yr labor warranty

Carrier Factory Authorized Dealer

Carrier Presidents Award Dealer

$7066

9 mos interest free financing

Option 3:

Carrier 24ANB136 2 stage condensor

CNPV4221 Coil

10 yrs parts

1 yr labor warranty

Carrier Factory Authorized Dealer

Carrier Presidents Award Dealer

$7956 - $500 NJ Cool Advantage Rebate

9 mos interest free financing

Option 4:

Carrier 24ANB736 2 stage condensor

CNPV4221 Coil

10 yrs parts

5 yrs labor warranty

Standard Carrier Dealer

$5750

6 mos interest free financing

I like the price of Option 4, the warranty of Option 1, and the dealer of Option 2/3. Any suggestions? Should we also look at heat pumps, or 1 stage units?