Taking block to machine shop, what to ask for?

Alright, I went to the machine shop and they gave me an estimate of $550 for all the machine work, cam bearing install, freeze plug install, and block cleaning. I think its not bad, what do you guys think?

Also, when doing the line bore do I need to have new main bearings on there already or is it done without the main bearings? I need to know because Im taking it next friday.