What type of Mac are you looking at?
The older style pear heads seem decent enough, but I wouldn't go out of my way to look for one.
Only 30 teeth, and pretty clunky in my experience.
These, on the other hand, are fine tooth and very good. They'll need a rebuild kit now and then though. They don't seem to wear as well as some.
http://www.mactools.com/en-us/Ratch...-11-Round-Head-Flex-Ratchet-with-Comfort-Grip
The exact same ratchets are also branded Proto, just with a knurled grip.
They're both made by Facom in Italy.
http://www.ebay.com/itm/Proto-J5257...1435199962&pt=Motors_Automotive_Tools&vxp=mtr
SK is tried and true, and will probably last a lifetime.
But they're not nearly as fine toothed, and the heads are far far bulkier than the Mac/Proto style.
If you're not set on either brand....
Gearwrench, Armstrong, Duralast, the new harborfreight pro flex, Carlyle.... are all good choices, with options for any budget..