I gotta say, if I was looking for a new progressive, I would lean pretty hard towards that LNL....
I have never run one, but it looks well enough made (for the things a progressive shines at.... quantity), the price, and that bullet deal is pretty good... those XTP's are nice bullets and not real cheap...
I'm personally glad you started out on a single stage... I think it's the best way to go and a great stepping stone to progressive... not to mention, you will still find uses for the single (decapping and resizing full length for instance, to make the progressive easier to run... or churning out some 'perfect' rounds to test/compete)