Get a Boss GT-8. Well worth the extra cash and all you'll ever need. If you do need anything else, just plug it in the send/receive loop.
There's no beating having literally hundreds of different sounds at your disposal as well as amp emulation and a wah built in.
If you have full access, there's a video here going through a bunch of the presets at random.

http://guitartricks.com/lesson.php?input=10991