Hi qfeuro,
Congratulations and best wishes for the wedding & honeymoon.
You've come to the right place for advice - but do a search of this thread as you will likely find lots of discussion on deals and suite upgrades.

For our honeymoon last year, we received a lakeview upgrade plus some gifts.
If you book and make a note that your stay is a honeymoon, you may well find that you get (subject to availability) an upgrade from a lakeview to a better suite.

Make sure you get to see 'O', and see if there are some stories here of upgrades to better suites with 'the $20 trick'

At these prices, it might also be worthwhile to search for discussions on the MGM Skylofts (w. chauffeured Maybach 62) or similar hotels on the Strip (just so you know what is available besides the Bellagio).

I'm sure you'll find a huge amount of info here - and remember that if during your stay you have any trouble, the staff/management of the hotel should be able to make amends or compensate you, to ensure that you are entirely happy with your stay.

Cheers and enjoy ^