Ideas for a second, smaller phone

Ok, so here's a question that I would appreciate any suggestions on...

Do to the size of my DHD, I sometimes wish that i had a smaller/lighter phone for those times when I go out on the town with my mates, especailly the times when things get a bit 'messy' and I panic about either losing my DHD, or having it stolen, or falling over in a drunken moment and breaking it etc etc.

I am therefore looking to get a second phone that I can stick my sim card in for those nights when I am out and dont want to have to worry if my DHD will make it home in one piece with me!

I was thinking of something like the Wildfire S, but have heard mixed comments on it. Ideally I want something running froyo as a minimum, with a reasonable camera (with flash), and a decent build. The smaller it is the better, although I dont want to have to go to something really small like the Sony Xperia Mini, as I like to be able to actually read the screen

Has anyone got any suggestions?

Thanks

 

Yes small and good battery life would be good, but I'm not bothered about wireless tethering......