MSD -vs- Jacobs

I"m looking into one of these, trying to squeeze a bit more performance and mileage out of the Barracuda. I can get a Jacobs pro-street setup locally for 125 (used of course) Question I have, there seems to be a lot more MSD out there, is that because they are better or just cheaper?

I realize that Jacobs got bought out, I'd assume you can still send it in and get it repaired if it takes a dump though....