A relative newb's experience - take it for what it is - only smoking three years and still a long way to go to get an educated palate.
I have a box of Behike 54's (Dec 11) and a box of 1966's (Mar 12) in the cooler - having only smoked one of each so far - I preferred the Behike over the 1966 - not saying it was bad, just not great, maybe I had high expectations, maybe just had a bad stick (remember, it is only one I smoked).
I smoked a Yolanda Canonazo the day before the 1966 and definitely preferred that (Irregardless of the fact that it was less than 30% of the price). I'm hoping age will show benefits.
Have smoked almost a box of the GE's and really like them. Enough to pick up another couple of boxes.
Someone just muled back a box of the 520's for me last week but I have not smoked one yet - they have just emerged from the freezer.
A very limited range to form any real opinions I know - except that I think the GE's are good and priced well (at least at Cuban prices).