Anyone have or just installed refrigerated A/C in your home?

[jasonb20]

I Need some advice from those that have refrigerated A/C or know about them. I currently have two evaporated coolers and looking for something alot better. My home is 2400 sqft and bi-level. I need a 2.5 or 3 ton upstairs and a 4 ton downstairs. I got one quote today and need to know if its decent or I'm about to be ripped off. I was quoted $11,275 for 2 Carrier brand units (Comfort model) installed using my existing metal ducts. The dealer said it would be an additional $1,400 for the electrical work (I can probably have my licensed electriction neighbor do the work for about half of that). The units are 14 seer using R-410A refrigerant. BTU's are 90,000 and 45,000. 5 yrs labor warranty and 10 year parts.
Now for the Questions:
1) Is this a fair price? What should I be paying or what did you pay?
2) Should I try to buy the Units wholesale elsewhere and have someone else install them?
3) I know how the seers rating works, but is 14 seers ok for dry climate such as in El Paso with very little humidity or should I go 13 seers?

I know this is WAY off-topic, but I'm moving on this pretty fast and need some input.

[Rambit]

I don't have an answer for you Jason, but at least this will bump it to the top for someone who may.

You're obviously in a different climate than I am where the requirements are a lot less for us. We in Canada usually have one unit to do the whole house, even for 90+ days with high humidity. My house is ~3200 sq. ft. and that's all I have. Wouldn't it be wiser to consult someone like Sears to have a professional evaluation of what size A/C units you need? You're not obligated to buy from them either and it would save you the additional cost of getting more than you need.

Bernie

[OoTLink]

Yeah, having dual units can also be a bit of a "what if it's a damn hot day and one of them fails" thing..