Love my Mia T&L Large Bebe, but now I need a small bag!

[JamiMac]

I LOVE my the T&L, but it is too much for everyday, especially with just the baby.

This is what I would like:

-Long strap that will hang over the stroller handlebar
-Something that will stand mostly on it's own
-Fairly flexible to fit in Bugaboo or Maclaren basket
-Needs to hold a few diapers, wipes, toys and mommy stuff
-Not too expensive
-Something easy to close and open
-Something lightweight

I really like the magnet closures on the Loom Marsupial, but isn't it too similar in size to the Large Bebe bag?

I also think the new LE Little Tripper is cute in the pink, but I've heard it falls forward with anything in the front pocket, is this true?

So, what do you all think?
Thanks!