If you intend doing more editing it might be better to save as tiff, if your done with the editing and just want pics for the web jpeg is fine.
tiff format won't lose a ton of the data like jpg will, so expect the file sizes to be bigger..
Tiff is a "lossless" file format (as AI says above) jpeg is a "lossy" format, every time you edit and save a jpeg it's re-compressed loosing some data. Tiff also supports 16bit (Your raw is 12 or 14 bit) jpeg is only 8 bit so if you want to keep the best quality keep a 16 bitt tiff, and of course your original raw.
I really don't see the point of keeping a TIFF, you can always go back to the RAW if you need to do some different processing.