Keep in mind many consumer and truck brand torque wrenches are only useful for a percentage of scale , ideally you want what you are going to torque in side that range close to the milled of said range. For occasional use one or twice a year or so Craftsman, Kobalt, Husky and even Harbor Freight are all just fine for the job. All of those brand I just mention will hold good accuracy for quite a long time if taken car of well. Personally in what I do I have top end industrial torque wrenches some days that get used 100's of times a day. I also will not buy a torque wrench that does not have use of 100% of scale and does not hold accuracy to +/- 3%. If you want to see my preferred brand check out
http://www.bestool-kanon.com/items/list.htm the best par is the pricing of these tools they blow away tool truck brands.
As for differing styles:
beam types are just fine for many auto motive applications and are quite cheap these days,
click type are also just fine and also on the bargains side if you stick with the previous brands listed
split beams are at the top end and are over kill unless you are doing engine builds, trans , or rear end work that need the precision and repeat-ability
