I'd like to add Bridge at this point.
When I first saw it, I thought: "You get +1 and -1 to costs, so it's basically a Silver".
Ah, my youthful ignorance.
I had overlooked the most important aspect of the card: +Buy.
I've been spending more and more time on the Bridge. Nowadays I'm actively looking for engines if Bridge is on the board and I'm finding more and more of them in places I didn't dare look before.
I just played a game with Spice Merchant to trash my Coppers, Worker's Village to give me actions, Vault to give me some draw and $ out of the Estates, Bridge of course and a handy Throne Room which goes well with a lot of these cards. Not even a couple of weeks ago, I would've thought: Vault is too weak of a drawer, Spice Merchant too weak of a trasher, etc...
The main thing about setting up for a megaturn is that it gives you a lot of control over when the game ends. In that game my opponent quickly got 3 Provinces before he stalled. I of course had 0.
But then I had one turn where it all came together and I bought out 8 3VP Gardens, 3 Bridges and a single Province to clinch the win.
Looking for engines is fun!