I must say that your response here to Chili comes across as a bit 'assholish'. I don't understand why you would respond in such a way when you are asking for suggestions.
As far as 'research' goes, it seems you have not done much yourself.
By the way, as stated twice now on two threads which you did 'ignore' and choose to not to take as important, your most important goal is to capture your performance as best as you can.
This means making sure the room, instrument and performance are the best it can be. The best mic or preamp can't 'fix' what it is given. This all involves much more than a simple answer.
Forget about your interface. It is the least issue in regards to quality recording at this point.
Don't get me wrong man, I always wish to help and will continue to do so. But you really should take each step in the recording chain seriously. First step would be to not be a dick and take the advice given.
Sorry for the semi-rant, but I at one time needed to be smacked in the face when wanting to find the 'holy grail' of recording. There is not one. It is all about every little detail throughout the process that makes a difference.