What Flat Iron is great for $100.00 to $150.00?

[#1]

T3 Pro Straighten is a fantastic flat iron.  Here's a description of it:  T3's unique, patented tourmaline technology infuses (doesn't spray or coat) the gem into the precision-engineered ceramic plates and heaters, ensuring the most reliable and superior styling. It effectively straightens even super-curly, unruly, and ethnic hair types. A fully adjustable temperature control (up to 410°F) delivers smooth, shiny, fabulously frizz-free results that last all day long.

It costs $99 and it should last you for years.  I've always had great results with T3 products.  You can find it at: 
http://www.sephora.com/browse/product.jhtml?id=P245252&categoryId=B70

I hope this helps you.

[#2]

It's not a flat iron but try the instyler it is a wonderful tool. you can do flat or curls anything you want. I love it!