There are a number of Dell outlets specialising in Dell returns, refurbished, overstocks. Dell direct sales also have various price concessions on same model specifications, with special discounts, 'free' upgrades depending on sales advert codes. Sometimes you might be able to 'negotiate' prices with the sale agents, at certain times of the sales month. All this can make the deal more financially attractive.
Regarding the choice, then this would depend on your exact wants and specifications. Dell have ranges to suit most needs, the 1750(?) is worthy of consideration.