K800i is supposed to be a better phone than K790i.
As posted by arun, Check out the Photo comparisions at GSM Arena here - GSM Arena
To me N73 pics looked better.
Comparisons on other sites -
Tech2
Tech2 said:
Vipurva feels that "if your primary criteria for choosing one of these phones is the camera, then I would recommend going in for the N73."
The camera on the N73 performed much better in our tests, grabbing at least three, if not four points, leaving the K790i behind with one or two points. Sony's Cybershot legacy and the presence of a real Xenon flash didn't help it much in our real world tests. This proves that it's not just the technology that matters, but how it is implemented in the phone that makes a difference.
Mobiletechreview
Mobiletechreview said:
While the N73's camcorder can't beat the VGA camcorder in the N93, it's very good and beats the Sony Ericsson K790 / K800i.
Only downpoint is the extremely low light conditions where the Xenon flash wins over the N73.
Now you have to decide which phone to go for.
As to N73 issues -
I have a N73 from the last 4 5 months. And i am a power user, i use everything from the Radio, the Music Player, PC Connectivity, more than 20 softwares, Camera, Software based Answering Machine and every possible use i can put it too (Its my watch too).
Hanging - It has never hanged on me, ever, even once!!
Slow Speed - I accept it was pretty slow when i bough it. But FW V4 has sped it up much beyond my expectation. Infact i did not expect any smartphone to be so fast. I was looking forward for a FW update ever since i bought this phone as FW's usually bring in numerous enhancements. But i no longer long for any FW update as the phone is virtually perfect for me. The RAM management has been completely transformed, no more application crashes for me due to memory limits.
The only downpoint is the Camera application restarting after every few pics with the latest FW, which i expect would be fixed in the next FW update.
One other plus point - Nokia as well as other companies have really come up with excellant softwares for the S60 phones which really take the phone to a different level than the other phones in competition.