Biochem courses

So I am trying to figure out my class schedule for Winter and wanted some input. I plan on taking LS3 in the winter, but I need to pick one more class for my major (already decided on 153L). The two I’m debating over are Chem153C or Chem110A.

153C has Koehler, who I haven’t heard great things from, plus the only section is at 8AM.

110A I heard is difficult, but the professor is Gelbart, who I’ve read some great reviews about.

Which one should I go for?