Looking for a Flash for Canon DSLR camera

[Entrepreneur]

The camera is a Canon EOS 20D.  Please recommend based on experience or knowledge of the product.

Thank you

[outinstyle]

How much do you want to spend?

Both of these are good:

http://www.bhphotovideo.com/c/search?Ntt=ca430ex2&N=0&InitialSearch=yes&sts=ma

http://www.bhphotovideo.com/c/product/486706-GREY/Canon_1946B002_Speedlite_580EX_II.html

[Entrepreneur]

How much do you want to spend?

Both of these are good:

http://www.bhphotovideo.com/c/search?Ntt=ca430ex2&N=0&InitialSearch=yes&sts=ma

http://www.bhphotovideo.com/c/product/486706-GREY/Canon_1946B002_Speedlite_580EX_II.html

Thank you.  In comparing them, they are pretty close.  One difference I noticed was that for Coverage the 430 EX goes up to 50mm while the 580 EX goes up to 155 mm.  I am no expert, is this such a big difference?

[outinstyle]

It depends on your use. Also one has wireless & the other doesnt.