Any terrific Math 53 profs?

<p>Are there any particularly good Math 53 profs that anyone knows of/taken from? I'm definitely taking 53 in the Spring and I have no idea who I want to take from.</p>

<p>Ralph Cohen who is teaching it this quarter is really good. I'm not sure if he's teaching in the spring though...</p>

<p>Anybody know anything about either one of the profs this quarter (Ionel or Galatius)?</p>

<p>how about
Lisi,Samuel Thomas?</p>