Prices will be lower next week; but don't buy, because prices will be lower the week after; but don't buy because . . . .
It is the nature of computers (and just about all electronics) that prices fall quite quickly. If you wait, everything will be cheaper. Manufacturers identify price points, e.g. £999 for computers and build systems to that price - you just get more and more for your money.
Soon, the processor you want will be, say, £70 and a slightly faster one will be £80. Which will you buy? Only you can decide.
Accept that anything you buy will be cheaper the week after you bought it and that you could have got something better for the price you paid. Just enjoy what you did get. Next time you upgrade, what you get for the money will blow your mind.