Haven't played Shadow or Ico myself. I'll definitely get the HD version of Shadow, though not so sure about Ico.
Pyro, I wouldn't bother with Awakening since they couldn't be bothered to finish the game. I was so upset with Awakening. If you want to read about my experience, read on, though it isn't spoiler free:
Basically it is obvious that at some point they decided to rush through the latter half of the game, even though the first half felt pretty good. While from the beginning it was obvious that they were working with a lower budget (no romances and unable to fully interact with the party members, the latter of which was a major selling point of DA:O), at least those limitations were clear to the developers from the start.
It is obvious that halfway through Awakening, the developers were forced to cut corners for whatever reason (EA happened, or limited interest in the DLC). Certain quests can't be completed successfully no matter what you do. On a certain quest, I was supposed to save some farmers from attack, and no matter what I tried, I couldn't get to them on time. A few frustrating quick loads later and an hour of repetition later, I went to the forums to find that it wasn't possible to complete the quest no matter what, with the speculation being that it was a budgetary cut. Other side quests were similarly left incomplete.
As you play through Awakening, you can alsodo sidequests to ensure that your castle survives the eventual major attack while you go off defending the bigger city. These sidequests last more than a few hours, and basically reward your castle with better infrastructure, defenses, and your men with better equipment.
While it is obvious that the game is structured so that you can return to your castle after you defend the main city, you simply can NOT. In fact, once you leave your castle to defend the city, you can't even interact with the party members you left behind.
And even if you completed at all the sidequests aimed at improving your castle's defenses, the city's garrison will still tell you that your castle fell. But if you DID complete all these sidequests, the text you see at the end (which is supposed to serve as some sort of half assed conclusion) contradicts what the garrison told you, that your castle did survive... even though on the map it showed as being annihilated along with all your party members.
I went to the Bioware forums, and everyone was really upset and people were bitching.
So yea, a waste of time and money. Bastards.