I also use Deli Selects, you get a few slices per serving because they're cut thin, but it doesn't seem like you're missing anything. DH loves their pastrami.
I also will try and stay away from the more processed stuff, like bologna, when ordering from the deli. So, I'll get turkey breast or some kind of lean ham. They have turkey ham and such, usually they'll give you a taste if you ask.
Best to you