I have a Kenwood chef and a Magimix and use both regularly. The best extra thing you can buy for the chef is the colendar and sieve, which makes sieving blackcurrants or gooseberries a doddle!
What do you find yourself avoiding more as you get older?
However, thinking of all the money I've saved over the years by not upgrading my appliances, I have just bought microwaveable jacket potatoes and a jar of onion gravy!