There are a few turbo kits for the 6, but the STS and Powerhouse are the best at this point because they don't have lag. There are a few people who are down on STS because they don't know anything about the technology, and they think its new. Remote mount turbos are a long tested, tried and true technology that has some advantages over a turbo under the hood. With that said ... Powerhouse makes a nice turbo, and should be seriously considered.
Turbochargedpower.com will have a twin turbo for the 05-08 V6 sometime this summer ... can't wait to see what power they get with it.
If up front cost is your issue ... check out
Nevarez Racing Products in Las Vegas, NV. They are the only authorized distributor in the country that will finance the STS system. I don't know if you can finance the Powerhouse or not. So call Nevarez and you might be able to just make payments.
You can drive to Vegas to have it installed, or they can send the system to you to install yourself (not hard), or have a local shop do it. I think it comes with the tune also. When I talked with STS they said they install the 5psi system, and tune it from there. After that you can buy a piece for $60 I think that will bump it all the way up to 12psi, but for a stock 6 they said you should run at 8psi.
Hopefully this will speed up your access to a power adder.