Recently got a 3/8" impact and now looking into a few of Sunex's 3/8" metric and SAE impact sets. Was going to get the metric 3329 and SAE 3325 master sets. Metric is 8-22mm and SAE 5/16 - 1", but now wondering if I'd be better served with Sunex's 3342 set. the 3342 only goes to 19mm and 3/4" in both shallow and deep sockets BUT is about half the cost of purchasing the seperate metric and SAE master sets. Not sure if it's worth the extra $$ for the few larger socket sizes in the master sets when I already have those sizes covered in my 1/2" impact sets. Only reason I can think of is a situtation where space won't allow 1/2" impact gun and socket. 
