Here is one recent reprint volume from Mighty Marvel which caught my attention. There are a ton of classic Marvel debuts included here and they are in chronological order. That's always a neat way to read these old tales, it gives a neat historical perspective to how the ideas unfolded back then. What really drew me to this volume, since I also own Fantastic Firsts from about a decade ago, is the inclusion of the Western stars among other less well known Marvel characters.
The cover was derived from this vintage Marvel ad, a neat bit of retro coolness all by itself.
Here are the covers of the comics included in this volume either in whole or part. Another neat thing is that between stories, other books of note are given a call out with a bevy of cover galleries.
A beautiful collection of grand stories in glorious color. With this collection you can really get a sense of the sweep of the Marvel Universe as it developed and matured. The inclusion of relatively unsuccessful series such as the Watcher and Captain Savage, really allows a broader view of what was going on at the time. When companies only reprint their hits, it makes it seem like no experimentation was going on. There was quite a bit going on at Marvel in the Silver Age, and this collection does a grand job of showcasing it. The cover galleries do a good job of filling the gaps for genre books like Millie the Model and such.
Marvel has two volumes upcoming this year focused on the 1970's, and at this point I need to plan to add them to the collection.