Bosch are alright, middle of the road as far as price goes, but anything above that and you're getting quite diminished gains.
I went with Bosch's higher end stuff for my kitchen last year, and I don't regret the choice. If I had more money at the time I think I might have gone for a more expensive brand, but I suspect I may have felt it wasn't money well spent.
One thing to be clear on though, they will inundate you with additional warranty marketing, don't be tempted it's a total rip off. Just register for the 2 year warranty and then rely on the Sale of Goods Act.