I didn't go look at the prices (I like it when people paste info into the thread vs. making me go looking for it), but, if I were going through this debate, here is what I would do:
1) Will the 2010 suit my needs? If no, go 2011, if yes....
2) I like a nice healthy difference to make me feel like the decision is clear-cut, so if I were going 2010 I would go with a refurbished one vs. a clearance one. They have all the same warranty, the same eligibility for Apple Care. Just not the fancy box. And you can return it if you get one that looks "used" (from what I understand they often look new).
For example, on the 13", you can save around $300 going refurbished 2010 over new 2011. That is 25% of the cost of your NEXT MBP (presuming you stay 13" and prices stay around the same). Or it's free Apple Care. Or it's a 128GB SSD and change. Or it's 8gigs of RAM and more change.
(Obviously if the prices you have in your link are the same or less than refurbished, then go that way. But the theory of my #1 and #2 hold true, to my mind anyway.)
