Teh Timefactor is a very, very nice piece of kit, I wouldn't mind one. I played a friends TF a few months back and it just sounded superb, particually with an MXR dist + and a budda wah infront.
Also worth checking is the TC Electronics Nova delay which is similar spec but a lot less (£160 iirc).
Not tried the Eventide modulation pedal though but I guess it's top notch sound quality though.