So, is W10 mobile ok on a primary device without a computer to rollback with?

[syscrh]

Sorry, I don't have a link for the US, but there's a great english ThinkPad community (forum . thinkpads . com) which also has a marketplace.
Another option would be to look it up on ebay.
X61t / X61 Tablet

3 or 4 days ago someone sold a X61t in good condition and lots of accessory in the German TP forum for 90 €.