Which pda would be the best (for the money) for use with the avalible ballistics programs? Been looking on E-bay, but there are so many to choose from. I am currently using a Compaq desktop, and do not have access to a laptop, with Windows XP operating system if that matters, but I would like for the both of them to be compatible. Now for the second question, other than the web-based mentioned in other posts what is a good or better program. I am also considering the RSI shooting lab.