As you'll see from my pictures below (which I couldn't figure out how to rotate), I need some new components on my bike. I had my bike hanging on my treadmill while changing the cassette on my trainer and it fell and it bent the big chain ring so as it comes around there is a definite wobble on part of it. I didn't notice this for a while so I am pretty sure since then it has stretched my chain and possibly rounded off the teeth on my cassette. So I am thinking I should buy new chain rings in the front, a new chain and a new rear cassette.

I am not exactly sure what I can reuse or what needs to be replaced (like my crank arms). Currently I have Truvativ 170 mm crank arms, says Rouleur and GXP GIGA X PIPE on there too. Chain rings are Raceface 53 X 39 tooth 9/10 speed. 28 X 11 cassette, I think a low level Sram or Shimano, and a Sram Rival rear derailleur. All of this is on a Specialized Transition.

What I am hoping you can help me with is telling me what exactly you would buy to get this bike back up and running. Do I need to get new crank arms, or can I reuse the ones I have? Since I need to change some things, should I also look at changing out other parts? I am not looking for highest grade necessarily, but if there is a more expensive part you would buy, then let me know. Thanks.