Doubts about Sony ereader management of Calibre collections

[romennim.livejournal.com]

Hi!

I want to buy a new ereader for Christmas: my Cybook Orizon is a nightmare when you need to manage hundreds of files.
I have set my eyes on the Sony PRS T2 because I've seen in a lot of comments that Sony ereaders are great with Calibre collections and I need to use them to navigate amidst so many files (I have 1500 epubs in my library, and I'd like to have them all on my ereader). I have only one doubt: all the comments I have read are about the older Sony ereaders (PRS 550 or 650), not about the new ones like the PRS T2, that has a different software, based on Android (like the T1). So I am wondering: do you know if the T2 is as good with Calibre collections as its older brothers? And: is it fast at opening/finding a file when you have hundreds of them?
Oh, and another thing: is it possible for the T2 to see folders created by the owner, like a USB storage?

Thanks in advance!