What is the cheapest and best mod chip??

[grunt3445]

I was wondering what would be the best mod chip to get. I want it to have a switch so i turn it on and off. I also don't want to pay too much for it cuz i live in canada and the exchange rate is not so good. I don't want to have to solider wires. So if any one can help me choose a mod chip your time and response will be greatly appreciated. Thanks.