once told me seriouslly that no one watch is worth above USD$100k.
I'm seriouslly trying to adhere to that advise
But back to you question regarding 5101, I feel that this is a watch that you should try putting on your wrist.
I was tempted to buy one after being offered twice at a very good rate,
it feels strange after putting it on my wrist. I don't really like it but it is simply just me.
If I have to choose betweem a 5004 or 5101, it will be 5004 200%.
But if you really want a tourbillion, how about a Lange PLM?
That's really really yummy