As noted above, neither the 1935 nor the 1945 have wifi. The 1945 has bluetooth, while the 1935 does not. If you want wifi incorporated into the unit you might consider waiting for the h4155.
Here is a quick comparison of the h2215, h1435, h1445:
h2215 - 64RAM/32ROM, 5.1oz, 400MHz, reg...