As just about anyone here would recommend, snag a blade sampler. I'd recommend either one from West Coast Shaving or BullGoose.
Dorco
Merkur
Derby/Crystal
Red Pack Israeli
Swedish Gillette/Wilkinson Sword (UK)
Feather
Agreed I suggest the MVP sampler from Bullgoose. There are no bad blades in that sampler pack.
+1, Only one missing would be the red ip's but there are some very good blades in this sampler.
Indeed - no further advice is necessary. http://westcoastshaving.com/index.php?main_page=page&id=1 suggests a good order in which to try the blades: