I've written a review of '300' over on Mental Kipple (my other blog that I really should write more for). Do please read it and let me know if it's useful.

...It is shot very prettily though, a vast majority of the scenes could be printed out as posters, the lighting and composition reminded me a lot of Caravaggio, and the comparison doesn’t end there with the large amount of stabby, stabby and beheadings in the film...

And I've just come back from a viewing for 'Sunshine', which will also get a review in short time.