A good basic / quick (I mean, for the Mahabharata) version would be the Ragopalachari version. It's not the best if you're interested in depth, but it is written read-ably and covers the general beats pretty well. Saw some negative reviews on amazon, but FWIW, I felt like this was a reasonable 101 version.
The best version for the scholars out there - ie, curious enough to read 18 volumes and willing to put up with some archaic english translation - is IMHO the Ganguli version. 1.99 on Kindle. This is definitely IMHO the most satisfying one to read if you're willing to put in the time. There's a faithfulness here that comes through, and you really realize how biased a lot of the other versions of mahabharata are.