I like my
Gecko cover a lot - the quality is very nice, and I can swap out my M-edge w/ the timer or Octovo booklights with the cover's open design of the top.
I also get quite a bit of use out of the Sony lighted case. I love how slim and lightweight it is, so it's my favorite for traveling. Picked it up on clearance - it's actually the T-2 model, but it fits the T-1 just fine.