If you want to do High Quality recording, you will have to use a line input, you will also need a good pre-amp - For Multi inputs you can either go for the Maya 44 MKII (four in) or the Maya 1010 eight input
You have not said what you want to record, choirs or bands... etc - But there are different set-ups for different recording, if you want do vocals and stuff, you need a good front-end with a Condenser mike that uses 48V phantom power...
Then there is the set up and spec of the PC