[fjtorres]

Pretty broad request but let's see if we can't focus things for you:

First, are you "religiously" opposed to DRM?

Second, location: are you in the US, Canada/UK, or elsewhere?

Third, do you intend to buy ebooks or just rely on PD, ebookstore freebies, or other sources?

Fourth, what kind of reading do you do? Recreational? Technical? Academic?

Fifth, do you hate Amazon?

See, the first thing you need to setttle is where you are *actually* going to get your ebooks, not just *theoretically*. Theoretically, everybody wants to get their hands on any ebook anywhere. In practice, most folks end up buying their ebooks (*if* they buy anything) from just a few places.

Second, there is no such thing as a *best* ereader app on any platform. Rather, what you can find is a variety of apps that are good for some uses but not others. Your specific needs will lead you over time to a set of apps that meet your needs.

Once you decide on what matters to you, you'll find the decisions get easier.

For example, if you refuse to deal with Amazon under any conditions, your format decision goes away and you only have to worry about the various DRM camps that split the ePub market. If you are opposed to all DRM (or are willing to learn how to strip it) *then* you can use Calibre as your "universal" ebook library manager, but if you don't feel comfortable with DRM-stripping, then you will have to manage your commercial ebooks outside of Calibre.

These are decisions only you can make based on *your* needs and your values, not the opinions, preferences, and biases of others.

If you have questions, ask away; folks around here are generally friendly and very helpful. But in the end your choice should be yours. There are no shortcuts through this particular forest.

G'luck!