Do not buy shoes (and kind) without trying them on first. If you take two pairs of identical shoes in the same size and put them on your feet, you may find that they fit quite differently. Your shoes might have cost a lot of money, but they were most likely assembled by workers who earn less in a week than you do in a day, so you can't expect them to be made very precisely.

The shoes should be somewhat loose when they are unfastened. Tighten the straps/laces until they fit properly, making sure than there is no pinching. Walk around in them a little and feel for tight spots around the toes or on the sides of your feet.

When I shop for a new pair of cycling shoes, I don't look for any particular model, I just look for the pair which fits the best. Often the most comfortable shoe turns out to be the most expensive, but I've been surprised from time to time.