They are very good blends. However, I am a McClelland's fan (and kind of like the ketchup/vinegar note they all have). I am also a big latakia and English/Balkan tobacco fan.
I have not yet tried FM Cellar, and I can't find anyone that has it in stock (scratch that, I just found some online and placed my first order). However, I have had all of the other three FM blends, and regularly stock them. I am a huge fan!
What is your timeline for ordering them? If you have time to wait and want to sample them before placing an order, I can get a small sample of FM, FMOTB, and FMOTT to you to try before you commit to a full tin.