If you want a really tall stem so you can ride really upright, get the technomic.

If you want a normal height stem, get the nitto pearl (also available in a 26mm clamp version).

The length refers to the stem length (part that sticks out over the tire), so if you want a long reach, get a long stem length.

I have a nitto pearl, and I love it.

I also have a cinelli x/a 130mm stem length if you are looking for one that long, pm me, and we can work something out. I'm not using it, and it needs a home. (it's in the want to trade thread if you want to see it).