you should be able to post a picture. you can either upload it into you gallery or you can upload the picture somewhere onto the web and cut & paste that link into your message. In the box that you type your message in there is a little icon (little button) that says insert image when you scroll your mouse over it. once you press that it'll allow you to type in the address of where your pictures are!
as for 331 vs 347 there is a ton of info on that on the web. I'm sure it's gonna come down to some opinions but here is a google search I did that was pretty good. I think for you the factor will be horse power. if you are aiming for 600's you might be better off with a 347.
Thank's for answwer. Do you help me choose the right parts? There is a place in the EUA that can send me the parts?