I am looking to replace my old AC unit/Coil/GF in my house (2 floors, 3,000 sq. ft) so I received 4 proposals and I am hoping that expert readers like some of you can help me and let me know which option would give me the most for my money:

Quote 1
Trane 13 seer 3 ton air conditioner
Trane coil
Trane 100,000 BTU gas furnace
Misc. materials, labor
Total Cost: $5,330
1 yr labor warranty, 10 yrs material warranty

Quote 2
Trane 15 seer air conditioner
Trane coil
Trane 100,000 BTU gas furnace
Misc. materials, labor
Total Cost: $5,830
1 yr labor warranty, 10 yrs material warranty

Quote 3
Carrier Infinity 16 Seer A/C
Carrier Infinity 80% AFUE Gas Furnace
Carrier Evaporator Coil
Thermostat Carrier
Total cost: $7,477
5 yrs labor warranty, 10 yrs parts warranty

Quote 4
Carrier Infinity 16 Seer A/C
Carrier Infinity 96% AFUE Gas Furnace
Carrier Evaporator Coil
Thermostat Carrier
Total cost: $8,080
5 yrs labor warranty, 10 yrs parts warranty

Thank you for your answers, I will make my choice based on your feedback as I do not know much on this.