i can highly recommend the retrobit vga box. I got mine from gameseek who are a very reputable company, i've bought many things from them without any problems.
here is the link:
http://www.gameseek.co.uk/pd/VideoGames ... er-VGA-Boxyour tv will need a vga port, i think its also know as dsub port, or you could use a pc monitor.
rgb scart is very good, and its whats i used for years until i bought vga.
vga is the ideal way to go.
if using vga you will also need a 3.5mm audio cable which you need to buy separately.
you will also need to own a vga cable itself.