You might find your request very hard to impossible to fill. Putting mics into a handheld probably doesn't cost much and there presumably is a market segment that wants them, so it seems nearly all the handheld recorders have them. And very few have digital inputs, so finding a recorder that has a digital input and doesn't have mics is not an easy task.
The Sonosax miniR82 seems to fit the bill, though it is $5000 and has 8 channels, so it might not be what you're after.
I just got a USBPre 2 and have been using it with a Sony D50. Works great, though the D50 does have mics.
Beyond the D50 and DR100mkII John mentioned, there also is the Marantz PMD-661 (which also has built in mics).