La isn't great but Santa Monica is worth a quick stop. I'd go California!
Bexgreen, we're doing 4 nights LA, drive to vegas and spend 4 nights there, we then drive to Yosemite and have 2 nights there finished by 4 nights in San Fran! I'm so excited. LA we are doing pretty much what Banari has suggested, vegas I want to see penn and teller and do the CSI experience (we're both science geeks), Yosemite was to break up the drive between Vegas and San Fran but it looks amazing. And I want to go to Alcatraz as I keep hearing rumours it's meant to be closing. Oh and of course the Grand Canyon! Neither of us are beach people so we wanted a honeymoon where we have plenty to do