Hey Jay,
Welcom to RWI and a very nice idea for the beginning! The Marlin modded 111 is the closest thing to the gen (without using gen parts and going franken) as you can get. I bet this would be your first purchase and maybe your first PAM as well, so my advice:
you buy the noob 111v3 and save the money you have for another super rep. Even the noob is so close to gen, you can't tell unless you're an expert. NO ONE apart from the 0,01% of the world's population would be able to call you out with it, and most of those people again are experts in reps (RWI/RG/RWG etc...) and watchsmiths, so why bother fooling them? They are your friends! But its just my piece of advice....
However, if you really like your 111 and money is burning your pocket, give a shout to Marlin, he does an amazing job!
But then again, if you have money burning your pocket and want to get closer to gen, why not buy the gen 111? It's a relatively easy find. Go over on paneristi.com and pick one up tax free....
I'd have Marlin mod a PAM of an exclusive piece, like a 127/217 for example. That costs >10,000$ easily as a gen and is hard to find. But again my advice only...
On the straps: if you wanna get close to OEM, grab an OEM over on risti, you can regularly catch a nice gator around 200-250$. Just my advice again.
'LPV Bespoke Leather' (130-150$) and
'Peter Watchacc' (170-190$) does some amazing straps, but they are not OEM. OEM quality in terms of gators is amazing with Panerai. But check out our Supporting Vendors (Timebandit and Bakeka for example) and Trusted Strapmakers (lots of nice guys there) to get you a custom made, real PAM strap
I wrote much more than I wanted to, please do not take me as someone trying to tell you what to do, I just got a moment to type my ideas on the matter.