What is a good singing coach program for a PC?

I'm not new to singing, but I really need to work on my range and
pitch.
I am running Windows 7 and i want a fairly cheap (under 50 bucks)
singing program that will help me find my full range, show me pitch,
has advancing scales, will show me what note I am singing, and having
a virtual piano/keyboard wouldn't hurt.
I found this program, 'Singing Coach'
http://www.amazon.com/exec/obidos/ISBN=B0006SE5BQ/ , unfortunately
it's slightly older and from what I have read, it wont run on Windows
7. Other than that, it seems to be what I want.
Anyone know of a program that would be something close to that?
I'm willing to pay slightly more than 50 if I can purchase it through
Amazon.

Thanks in advance =]

btw...singing lessons are out of the question right now