If you live in a major metro area you should have no problem in getting parts for an Aga. My only problem with them is I like to see what I'm cooking without oopening the door.
Wolfs are incredibly easy to clean. Everything comes apart. It truly is worth every penny IMO. When we redo the kitchen the only thing I would consider instead is a Blue Star. Also totally agree about the Miele dishwasher. 20 year old one is dead silent and works like a charm.
For those of you who've never heard of Blue Star you can build your own:
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