When you "safest place to buy" presumably you mean online? If yes, check out the price runner site at least for prices. "Safest" could be down to you as far as being 'secure' online. Have you purchased stuff online before? Do you take the neccessary precautions for online buying? I think the site for best prices is click here Check google for it if it doesn'y turn out right.
I've got it wrong twice before buying online from pc companies which subsequently went bust. First time it was Panrix who went into administration after taking my order, fortunately Barclaycard bailed me out. (They are back in business now!) Second time it was Multivision who went titsup after 18 months rendering the 5 yr warranty useless.
Now I'd recommend Evesham; A bit more expensive than Dell, but the tech support comes from people based in the UK who seem to know what they are talking about, rather than reading through a standard script and telling you things you already know. They have been around for a while, continue to get good reviews, so they just might be providing support for as long as your warranty lasts.