Ovens - do I need all of these functions!?!?!?

We're redoing our kitchen and need to buy and oven.  There's a Bosch hob that I like so I figured we'd go for a Bosch oven to match - went on their website and there are about 8 seemingly similar single ovens!  Of course they all have a variety of functions and prices to match.  My question is - do I need all of these functions?  Will I ever use them? 

Tell me which have been most useful for you.

Thanks!

Self cleaning ovens are invaluable in my opinion.   

Self cleaning ovens are invaluable in my opinion.  

Be careful with what they call self cleaning ovens here as often they consider the ovens with catlytic liners to be 'self-cleaning'.  For a real self cleaning oven where your have a special setting and the oven locks itself and gets so hot it burns off all the splatters and spill it must be called pyrolytic self cleaning.

As for all of the functions on the oven I would say that I have used all of them but of course I just use 3 of them most often.  I love to cook so bought one of the best ovens I could find and haven't regretted my choice.