My current stem on my zoot is 60mm x 17degree. Feels awsome i rekon. Hope 70x25 (i think) feel mint too! But thats if you want to splash out. However, youl never need a new stem again!
I run about 30mm of stackers aswell, which brings the front end up alot, making it feel alot more streety! It depends what you want to use it for really, my set up is for bunnyhops and manuals and some spinny stuff, Not Tgs!
Owen