The agony of choice!

For my birthday, I received this stack of 10 Chf notes that I mentioned about yesterday and other notes towards a lens of my choice. I have my eye on a Canon EF 100-400mm, 4.5-5.6 L IS USM. Maybe I should rent one for a day and see if it's something that will suit me.

PS, it's not every birthday that I receive such a generous gift!