Without a doubt the 33C/G because I really dislike the handle on the 2-piece Merkurs. Too heavy and too short they feel like clumsy in my hands. I know a lot of guys will disagree but I wouldn't want a 34C for free.
The classic (15/23/25/33/41/42) Merkurs are the only ones in my book worth to get. Still the 33C is not in my top 5 btw.