This could be interesting - a good suit will depend on body shape as many are cut for a particular shape/size. Many off the peg suits are frankly, rubbish when it comes down to any assessment of style or quality. However, that is oftern irrelevant if you are sitting in an office all day and just need something formal for that. A bad suit is easily spotted, but imo you can't go wrong with Hackett or Aquascutum for off the peg suits that use decent cloth and are flatteringly cut. The best option is to go bespoke, or at least made-to-measure. For £500-£600 you can get a made-to-measure suit which will look the business. A no brainer really when you can pay that for an off the peg "designer" suit that is churned out by the dozen. Remember the retail mark up on clothes is horrific, so if you pay £500, the retailer pays £250, the distributor £125 etc etc.