Well,you wont find good preamps in any of these budget mixers.
Good mic preamps usualy come as a standalone box ,mono or dual mono if you dont happen to own a neve\ssl\TLA\studer\Amek console
it sounds to me like you dont need a mixer but what you need is an Analog 2 Digital convertor or in other words an A\D convertor.
is your soundcard expandable? does it allow for ADAT connection?
take into consideration that with a convertor you will get a seperate channel in your DAW for every input while with an analog mixer you have only 2 Mono Outputs\the Sum of all the channels.
whats your budget and how many inputs do you need?
what gear do you corrently have?