The only problem's I've ever had with 24bit were self inflicted. In the beginning, I didn't have the drive space or resources to handle the file sizes. Which was not hard to fix. Just a little expensive.
The only time I run into problems anymore with 24bit, is when (and there are still many), folks I work with are not yet equipped with 24bit environments. And, can't use the files I provide them with.
Neither is a reason to stay in the 16bit environment. But, at least, things to consider, and tuck away in the memory bank.
I haven't used the 1010, but did take a look at it once. I used an Echo card a while back. But, was disappointed with it. Not in it's performance. But, in the way it was put together. The 1/4 jacks did not hold up. And, it didn't take long until one of them actually shorted out and blew one of my mixers.
I use several M-Audio pieces of gear. Some great. Some Okay...
You're on the right road, just keep asking questions, and looking at all the solutions that or out there.
Good Luck,
BW@
BW@