Question : Problem: What is the best Long Range PCI Network Adapter get.

Does any one have a suggestion as to a long range Wireless PCI Network Adater (g).  I will have to use and external antenna. The wireless PCI adapter card must have great transmitt and recieve power.

Answer : Problem: What is the best Long Range PCI Network Adapter get.

Do you have an option to upgrade the router/access point as well? If you upgraded to single band wireless-n you would get the best range, and increased throughput. If that's an option I'd totally go for that, but if you can only upgrade the adapter these ones are nice:

good:
http://www.newegg.com/Product/Product.aspx?Item=N82E16833315041

better:
http://www.newegg.com/Product/Product.aspx?Item=N82E16833180052

best:
http://www.newegg.com/Product/Product.aspx?Item=N82E16833120033

But antennas are going to play a big part in range here, take a look at these:

http://www.newegg.com/Product/Product.aspx?Item=N82E16833127063
http://www.newegg.com/Product/Product.aspx?Item=N82E16833995003

extension cable:
http://www.newegg.com/Product/Product.aspx?Item=N82E16833164011

There's lots of different antennas available, it depends on your situation and how much you'd like to spend. I would say getting one of the cheaper wireless cards, and upgrading the antenna would give you nice range.