I have been thinking about this version:
Rebuild - $5
+1 Action
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Look through your discard pile. You may trash one Victory card from it.
If you do, gain a Victory card costing up to $3 more than the trashed card.
So basically this trashes from your discard instead of your deck and you can target any card without the awkward "name a card you don't want to trash". Being able to trash any card looks stronger on paper, but you're shuffling way less, so you'll get to play Rebuild less often, and of course have to deal with the "Counting House" problem where you won't always have the card you want in your discard. So overall I wonder if this stronger, weaker, or somewhat similar.
Thoughts?