The iPAQ 1945/1935 and iPAQ 2215 blow the iPAQ 38xx out of the water.
With the new HP iPAQs, you get native PPC2003 support, faster more power efficient processors (PXA255 on the 2215 and Samsung ARM on the 1945/1935). You also get integrated Bluetooth (1945 & 2215). You also get replaceable batteries.
Yes, the screens on the 19xx and 2215 are smaller, but they are of higher quality than the 38xx (HP didn't switch to the newer screen transflective tech until the 39xx series) and the pixels are closer together (denser) for a better quality image (320x240 @ 3.5" vs 3.8").
Not to mention the size differences. The 38xx is fuggin' HUGE and heavy. And if I'm not mistaken, I don't think that its SD slot is SDIO.
And don't get me started on the expansion slots. I used to have a 37xx iPAQ. It's bad enough with it "naked," but add on the expansion slots and it goes from bad to worse. Only makes it heavier and bulkier.
Given that the 1935 can be had for $199 after rebate, I see no reason to pick the iPAQ 38xx over it. You get a MUCH smaller PDA, full SDIO support, and. removeable battery. You could spend a little more and get a 1945 and get Bluetooth and a slightly faster processor.
And I haven't even started with the iPAQ 2215 yet. This is bar hand down THE best PocketPC on the market. It has an SDIO slot AND a CF slot and is still much lighter, thinner and smaller than the iPAQ 38xx. Sure, it's ~$350 if you look hard enough, but it's the BEST any PocketPC manufacturer has to offer right now.
$200 + tax is too much to spend on an outdated relic like the 38xx when there are newer and better devices out there for the same money.