What class are you racing and what motors do they allow for?
Spec class? Mod? Can you run timing?

You will get alot of opinions on this but I will give you mine....

Castle MMP for the ESC. Best bang for the buck ESC that allows for future firmware upgrades and timing control. You can also run without timing control but this will give you the best of both worlds for around $125.

As for motor, depends on what your class is and track rules.
If you run spec, then you may be limited to 17.5T brushless.
If you can run timing in the ESC, I would say a 13.5T would be the best all around motor for this 2WD SC truck. If you are not allowed to run timing, then I would say 10.5 to 8.5T brushless if the class/track allow. My 17.5T with MMP running timing in Cheat Mode makes my 10.5T feel slow. I run an SC10 and XXX-SCT.

As for motor brand, lot of opinions here. I have run Novak Ballistic and Tekin. I like them both but prefer the Tekin for my use. You want the best bang for the buck, then I would say a re-manufactured Novak SS motor which can be had for $50. Comes with full warranty and even though it is not modular like the ballistic, I hear it has a better timing ring setup.

If you do go the Castle MMP route, be sure to get the CastleLink module so that you may customize the tuning on a computer OR you can get the track card but you don't have as many options. The MMP comes with a coupon to get either the CastleLink or track card for $10 direct from Castle.

Castle MMP: $125
Novak SS brushless motor: $50
CastleLink: $10

All below your budget of $200.
A Tekin RS combo will run you $250 discounted and then another $35 for the LiveWire module. LRP combo will run even more.
Anything that costs less will not have the same performance and ability to run timing in the ESC.