Hey guys, I need a couple computers for my office. I don't know too much about technical side of computers, so please help. I've been getting into a lot of social network marketing - using bots for myspace, twitter, facebook, craigslist, etc. Beside general internet usage, that's the only thing I'll be using the computers, and having many browser open whiling running these programs. Those bots seem to need a fast set-up. Whats a bare bones cheap package that you can recommend to me that can run these programs extremely efficiently?

Thanks so much,