Just to add my view!
If you are getting the MixPre then do you really need a recorder with XLR inputs? Why not consider the Sony PCM-M10 or the PCM-D50. They are superior recorders in every way, the build quality is superb (I have the D50 and it's incredible), they have a very sophisticated limiter which is very good and the battery life is phenomenal! (I am still on my first set of batteries after almost 2 weeks of pretty heavy use!!)
You can also plug the MixPre directly into the line input of the recorder from the tape output, if you do need to reduce the level the recorder has a 20db pad switch built in.
I did an awful lot of research when I was looking for a portable recorder and for my needs the PDM-D50 was the best choice. If you get the chance to hold the recorders you will feel the quality difference immediately, the moment I held the H4N I knew that I would never buy a Zoom recorder, it's incredibly plasticy and it feels like it will break any second. If you have no backup recorder I would not go for the H4N and look for something that is built from metal.
Good luck with your project.