Before buying anything, remove that ASAPI driver and find yourself a copy of FORCEASPI. This will allow you to run Adaptec's ASPI layer on non-adaptec hardware (some versions of their installer will check and won't allow you to install the download from their website).

You should be able to search google for it - or take a look through the message board at the Audiograbber site (it's come up in conversation many times before).

Bruno