You can spend just about as much as you want on a suit, particularly if you go for a bespoke affair.That said, some advice:1) Don't buy black. A previously pointed out, black suits are for funerals.2) Don't buy big label 'designer' suits. Mostly they're overpriced and not very well cut.3) Never, ever, ever wear a brown suit unless you're going deer stalking or driven game shooting.4) You can get a good suit for £500 and a great one for £800 if you go to a reputable tailor.5) A good suit made of good material is more expensive than M&S but will last a lot longer before the backside goes shiny.Personally I tend to go for dark grey, blue grey, or blue with pinstripes. Don't forget to buy some good ties and double-cuff shirts to go with the suit plus a decent pair of shoes.EC