That particular model seems to have suitable specifications, but remember the extra price for a monitor. The unit itself can be a simple returns under the distance selling regulations or perhaps a 'problem' computer that someone has rejected, either way you still have a full 12 months warranty available (which I would check out the details, before purchase, as they may differ slightly from a brand new machine).
Waiting for a better bargain, doesn't seem to apply nowadays. Retailers and manufacturers all seem to have 'bargains buys' every month.
Remember to buy with a credit card or computer finance for extra security and more peace of mind.