I'll go ahead and second the Pitchfactor recommendation. Some of the modes have delay, and some have reverb. You get both with the PF! The delay is clean, basically like the digital delay mode of the TF, until you introduce the pitch modulation. Dial the time down low enough and the delays will create some very nice slapback sounds, especially in the Micropitch mode. Quadravox mode will actually give you four pitch shiftable delays at once, Crystals mode has reverse pitch shifting with delays and reverb, and the Synthonizer mode will add two synth voices with reverb to your input signal. Plus, all the crazy stuff in  the Harmodulator and Harpeggiator modes will basically turn any keyboard into a superpowered modular system.