Well, both can be pretty impressive on paper. I wish this would translate into real life.
Rivers didn't really have a great first half of the season last year. He threw for 0 or 1 TD in his first 8 games. While he began to make up for it the last half of the season, he went interception happy.
With V Jax gone, emphasis on Matthews and a 32 year old Gates.. it's not looking good. But in the past Rivers has wowed us all.
Romo (on paper) is ridiculous. And given his record against the Giants last year - 321 yards, 4 touchdowns, 0 interceptions in week 14, and 280 yards, 2 touchdowns and 2 interceptions in week 17 shows he can produce. But the Giants have a nasty pass rush, and it is a rival game so emotions are high.
For the RB situation, Bush might only see goal line oppotunities if Forte is healthy. There's no telling Forte's workload as it is week one. I would imagine Forte will get a healthy amount of carries.
For the WR's, I'd say Smith. Deep threat, young, fast and has a QB with a rocket arm who loves to hit him down field. Decker wouldn't be a bad choice either.