Little Labs Redeye, problem with signal level

Un-/balanced was a new term for me. i thought it's enough when the output and input jacks are of the same type :D (balanced-balanced or unbalanced-unbalanced) that there exist "special" balanced cables i did not know.. and that these balanced cables are nothing more than normal stereo i know the functionality of balanced signal transmission ;)
A little bit offtopic.but it's my thread :p
Instead of buying another expensive audiointerface...could i also only buy a good micpreamp and go from the guitar into the redeye then in the new mic preamp and then in the line in/ phone jack input from my interface instead of the xlr in/mic in to avoid using the build in mic preamp which produces (probably) the noise? or will the interface still add its noise?