My thoughts on both....
CX - I dont think any 1992 CX is worth that much money. But I would rather have this car over the Si since its lighter. As far as comfort, they are EGs, not much comfort level with any trim package.
Si - The biggest thing I would like about the Si is that is comes factory with rear disc brakes, which saves a lot of time and money later on. It may even come with sway bars, I dunno. But if it has rust and shit, it will cost a lot of money to get that shit fixed.