I'm planning on buying an Id with a horizontal brain cell inside. I just purchased a Lenovo T400 (came out yesterday), and customer service told me that the dimensions were (WxDxH): 13.2" x 10.7" x 1.34–1.46" with the 9 cell battery. The Lenovo Tabook lists the dimensions as 13.2" x 10.4" x 1.1–1.3", very similar. I believe the Tabook dimensions are more correct.
I assume the size 2S is correct (14.5 × 10.8 × 1.7 inches) as it's what the T61 9-Cell is listed as, but it seems too wide. Is there a better choice, or will it stay snug anyways?