Just a question I'd like to get some opinions on please!

Just for reference, I'm in a standard scoring, no PPR Yahoo league that starts: 1 QB, 3 WR, 2 RB, 1 TE, 1 K, and 1 D. I am currently in 1st place and 7-1 overall.

Strategy-wise, moving into the second half of the season and then fantasy playoffs, would you guys rather have solid depth or try to swing trades to upgrade any weaknesses on your team?

For example, the RBs on my roster are: Arian Foster, Rashard Mendenhall, Ahmad Bradshaw, Pierre Thomas (ugh), and Knowshon Moreno; so overall pretty happy with the top three. But my current QB situation kind of gives me pause; I rotate Flacco and Orton based on matchup (mostly Orton though). What would you do in this situation?

Thanks in advance!

Edit: Also, I'd like to add that my TE situation also seems a little iffy to me. I've been rolling with Aaron Hernandez for the past few weeks (Jermichael Finley refugee haha) and I just added Jacob Tamme. Hernandez has been a pretty steady 5-7 points every week but in the majority of redzone situations he takes a backseat to the other Patriots TE Gronkowski which is maddening. Tamme looked good in his first start but can we trust him? He played against Houston's league-worst pass D.