I don't know the specifics of the Spider-Man collections, but the inaugural Venom/Alien Costume arc and that Hobgoblin story have both been reprinted numerous times in paperback form. Here are a couple I found on Amazon.
Spider-Man: Origin of the Hobgoblin
Spider-Man: Birth of Venom
The only Masterworks I have are Fantastic Four
Vol. 10 (the end of Jack Kirby's run, which I bought to supplement my omnibus volumes of the earlier stories) and
Savage She-Hulk Vol. 1 (just came out in the fall of 2017, covers issues 1-14 of her original series from 1980). The reproduction quality is truly stellar, and the paper stock they use is slightly glossy and very smooth.
Also, I have several Marvel Omnibi that I enjoy. They are an oversized format with the same great paper quality as the MMWs. Usually, they are a compilation of material from two or three MMW volumes. Some of the ones I've bought include:
- The Ditko/Lee run on Amazing Spider-Man (Issues 1-38 plus the annuals)
- The first three omnibi of Claremont's X-Men (Giant-Size X-Men#1-Uncanny X-Men #175 or so).
- The Frank Miller/Klaus Janson Daredevil run.
- Grant Morrison's New X-Men.
- Matt Fraction's two series run on Fantastic Four where Reed, Sue, Ben, and Johnny travel to space while Ms. Thing, Medusa, Ant-Man, and She-Hulk cover for them on Earth.
- John Byrne's run on FF, collected across two omnibus volumes, which features She-Hulk's tenure on the team in Ben's absence.
I know there is also a
Roger Stern Spider-Man omnibus that covers the Hobgoblin origin along with the first issue or so of the symbiote arc IIRC. I feel that the omnibus volumes are more cost effective, especially with the low prices from seller websites like
InStockTrades and
CheapGraphicNovels.
Here's a sample of what the Stern
Spider-Man omni looks like.
If it's a run of something that is very important to you and you don't mind spend a little more than you would on the Essentials, it's worth it. Also check your LCS for damaged copies and markdowns. I found the
Jessica Jones/ALIAS omnibus with a slightly dented cover for $30, despite the fact that it was OOP and the MSRP is around $100.