[Tom8o]

Hello! I'm new here, so I'm sorry if some of these questions are glaringly obvious and/or against the rules. Here goes!

Turkey is not a prosperous place for reading, let alone ereaders. Up until literally last week, the only ereader officially on sale in Turkey was a local brand called "reeder". However, as of last week a popular bookstore has been displaying several Kobo models with rather fair prices! They had a model without backlight, forgot which (Aura HD?), Glo HD, and Aura H2O. Glo HD seems to be the sweet spot for me. Perfect size too (I love small-ish devices). So far so good! I love all the options for text formatting, margins, text size, etc. In fact, I have no complaints about it at all save for one crucial thing:

I'm very disappointed in the Kobo library.

I looked for some books I'd already bought for Kindle, and many of them were not on Kobo (tried to switch to Worldwide on the Kobo app on my phone as well, which yielded the same results). As my main purpose for buying an ereader is for reading English books for cheap, this is very worrying. However, I know that Amazon books can be sideloaded to Kobo ereaders. I already downloaded Calibre and de-DRM'd several books, which wasn't too inconvenient. I have a couple questions about the process, though.

1) Is the AZM3 -> KePub conversion in Calibre consistently good? Does it mess up often when it comes to Amazon books, does it create issues with the formatting? I don't think that having to buy books from the Internet and sideloading them will be a problem.
2) What exactly do I lose if I primarily sideload books to Kobo? I think I lose some social features, and obviously inter-device sync, but does a sideloaded book have any difference from a book you'd buy from Kobo?

In comparison, the only reason I'm considering the Kindle is because of its library- Kobo's freedom in terms of platform is very welcome, and so is the myriad text options. However, book sync and the convenience and security of buying books from Amazon's own store is putting me in a dilemma. It isn't officially available, but it seems that a liked seller on a reputable local website (like Ebay) is selling Paperwhite '15 for more or less the same price.

TL;DR:

Kobo pros:
+More freedom with text in the book and the ereader itself
+Prefer the design (helps that unlike the Kindle I can hold this one before buying)
+Sold officially (also makes me want to support the brand for bringing it over, with a surprising Turkish ebook library and Turkish language options) which probably means it's also in better hands if it is defective or breaks or something)

Kobo cons:
-THE STORE IS SHITTY.


Kindle pros:
+THE STORE IS AMAZING!
+A better-known and (IMHO) more trustworthy brand
+More convenient overall

Kindle cons:
-Worse design (don't like the thick bottom bezel)
-Not sold officially
-Less freedom with text while reading
-Less freedom for the platform (don't think this will matter much though since I'd likely need nothing more than Kindle's store)

So yeah, it's a pretty tight dilemma for me, but I think that if Kindle books work consistently well when sideloaded to Kobo (as KePub since I like the title display etc. features) I'll go with the Glo HD.

Thanks a ton for reading!