Good portable USB drive?

[Shurane]

So I've been looking for small form factor (SFF) flash drives to set and forget on various computers, while I backup files to them on a regular basis (using tools like bvckup. What I'm looking for are flash drives that sit flush with the computer.

I'm not against using really portable SD/SDHC/SDXC card readers either. I just want something that sits flush with the usb port.

What I've found, so far:

Lexar Echo ZX
Sandisk Cruzer Fit
Verbatim Store n' Stay
LaCie MosKeyto
Kingston Digital DT Micro
HP v165w

SD Card readers:

Elago Mobile Nano ii
elago Mobile microSDHC

Kingston G2 Card Reader (fcr-mrg2)

Any other choices I should be aware of? Which of these (or others) would you guys recommend?

 

[plagas]

Is there a particular size you are looking for?

 

[Shurane]

I don't have dimensions in mind, but something that I could leave on the side of a laptop without worrying about it breaking off. Something that would sit flush so I can put a laptop, flash drive and all (still attached), into a backpack/laptop case.