It really depends what you want to bend. I've had good luck with my Howron Metal Bender. I bought it from these guys:
http://www.barnonediesel.com/Metal_Benders.php I liked the price, being American made, and the customer service above all.
I initially bought a Chinese bender and it never bent straight and finally one day bent all to heck . I won't make that mistake again.
I hope this helps!