181 all the way.
Don't worry about census numbers, the census is full of ghost numbers. That's just how many times they have given a grade to the book X number of times, not everyone sends back the labels. So the census numbers are off and is not the end all, be all deciding factor of what or not to purchase. I see Hulk 181 as "Investing in Wolverine" Just like people invest in Spider-Man. The more popular the character, the more expensive their 1st appearance is going to be. GSX 1 is great to have, but Storm, Nightcrawler and Colossus aren't Wolverine. That's why I traded away my Journey 83 7.0 years ago to get a 2.5 AF 15....Thor is great, but he's not Spider-Man. Get a 181 now while the book is asleep, don't wait for a "market correction" Once Wolverine is announced, you'd wish you had acted sooner.