My Bosch, and my mum's Bosch, and my sister's Bosch, have all lasted between ten and twenty years and were eventually changed due to moving house, or refitting kitchen, or being more noisy than later ones, and not because they broke down. My old one is still being used by someone who gave me £10 for it.
Can you guess what make the new ones are?
My latest is actually badged Siemens which is designed and made by the jointly-owned BSH (Bosch Siemens Hausgerate) company which also makes Bosch (and Neff, and some other brands). They are said to be even better and tend to aim a bit more upmarket.
Looking at the current "Which" best buy Bosch, full-size, free-standing in your budget are:
Bosch
SMS40C12GB
scored 69%, £338
Bosch
SMS40A08GB
79% £375
Neff
S51E50X1GB
71% £362
I can't speak for the other brands.
Sometimes you will find a special offer or a last-years model reduced at John Lewis, but ask someone to check the test reports.
You can browse back numbers free at your local library.