It sort of depends on what you're going to put it in. I have the 2362 because I have a small that I'm putting it in. The 2362 is 1.89" x 1.89" x 3", so it's pretty small. It does get the job done though and it's about $42.
SYL-2352 is also an excellent product that many brewers use. It is my choice for a PID controller. It can be used with type K or RTD temp probe.
Edit: BTW - If you are looking for a really neat RIMS setup - check this one out. RIMS Tube from Brewers Hardware
I discovered it in a thread on this forum site.