Numbers vs. Libreoffice calc

I've been using LO since the star office days and built up various finance related documents over the years. With Apple's recent announcement of Numbers having stock quote by default got me intrigued. LO has stock extensions that can be broken at times.

Those of you who've used both, can you shed some light on what benefits Numbers might provide over LO. My initial impression is that it's clutter-free, simpler and easier to use. But since there's no direct conversion mechanism of converting LO documents to Numbers, I need to have more incentive before I make the switch. To convert LO documents to Numbers, one has to convert them to Excel first and then to Numbers.

I've heard it mentioned once or twice that the iWork suite is one of the best productivity apps out there. And I'm not sure how. My usage will be limited to pages and numbers (if I go down that route). I don't do presentations, hence don't need keynote.

Thanks.