Once you hear a good reverb sound, you wont want to waste your money on noise boxes. The TC boxes are not quite as noisy as the others. I think it is mostly due to their higher threshold abilities. They do also however, raise the noise floor substancially. I personally find Lexicon to have the best for the buck, and Digitech gear to be the noisiest. Their rack gear is noisier than some floor pedals even. In fact I am forced to charge more for mastering when some Digitech gear is used because I have to go through two more stages of processing to lower the noise floor from the 20 dB that it raises it. Yup, 20dB rise in floor noise. Now does that suck or what!? Its not originated from the power supply either. Some people say, "I don't hear no noise"...what can I say?....buy it then. Hopefully I won't be summoned to process the work.
Don't shop for and trial equipment in a noisey guitar shop. Do it in a quiet area where you can hear all of the thing.
MORPH!