Have been using a USB Creative Sound Blaster Audigy2 NX

We're looking for a comparable external HD 24bit sound device...

Have been through 3x of the Creative USB ones in the last 2 years - they just seem to fry themselves for no reason (appears like there is no power, but have tested power adapter and no problems)
 so would prefer to try something else... (current one is 40 days past warranty)

Would prefer to not go internal, as we have previously had problems when recording (feedback from our mixing desk or something??- dont ask!)

Any ideas? what other reputable brands and external devices are there?? and approx costs???