Well, for me it's hard to choose! 
Firstly, for US banknotes, I prefer PCGS ...
Secondly:
- If I'm looking for "High" grades, I would go for #3
- If I'm looking for "High" grades and "Varieties", I would go again for #3 (MULE)
- If I'm looking for "Signatures" only, I would go for #2 (Teehee-Burke)
- If I'm looking for any specimen (regardless its condition) &/or with limited budget, I would go for #2
- If I'm looking for "somewhat" High grades, I would go for #1
Cheers
Firstly, for US banknotes, I prefer PCGS ...
Secondly:
- If I'm looking for "High" grades, I would go for #3
- If I'm looking for "High" grades and "Varieties", I would go again for #3 (MULE)
- If I'm looking for "Signatures" only, I would go for #2 (Teehee-Burke)
- If I'm looking for any specimen (regardless its condition) &/or with limited budget, I would go for #2
- If I'm looking for "somewhat" High grades, I would go for #1
Cheers



















