asterisk users - Jul 2008 - Recommend Bluetooth adapters for chan_mobile?

I've been experimenting with chan_mobile, and am finding it's less than 
reliable using the bargain-basement class 2 USB adapter I had lying around.

I've seen good reports in various posts around the 'net, and suspect if 
I were to get a better USB adapter (two, actually - two phones) then I'd 
see better results. I think it'll need to be class 1 (100m range) rather 
than class 2 (10m range) because of the layout of my home (it's not big, 
just a few walls in the way).

Googling didn't turn up a lot of useful information, except a common 
recommendation to use CSR-based adapters - but little (current) info on 
which adapters are (my current one isn't).

Can anyone share their experiences and specific recommendations for 
Bluetooth USB adapters to use with chan_mobile? (available in the United 
States).

Any other sage advice for getting the most from chan_mobile?

Thanks in advance,

Paul

(Fedora 9, with bluez 3.32 and asterisk 1.6.0-0.17.beta9 versions of 
asterisk and asterisk-mobile RPMs installed)