The 177 G is a stunner. It was the first Panerai I bought in 2004. The years prior to the 177 the titanium Luminor Marina, the 61 and the 118 were very similar but that had a tobacco dial rather than a black dial, and the 61 had a solid case back rather than a sapphire back.
I now own a 61 because I prefer the solid case back and the tobacco dial, the PAM 36 is my ultimate Panerai Grail but the 61 is almost there.
IMO the sausage printed dial suits the case better than the sandwich dial of later renditions.
It all really is dependant upon price. More pics of the watch would help too.
This it my 61D for reference.