if you don't have ratcheting wrenches but do have a reasonably complete set of non-ratcheters, i would definitely get a 2nd set with them. might even consider flex head ratcheting wrenches.
people are generally very 'pro' reversible or it doesn't bother them. i actually much prefer the non-reversing ones, as i generally like zero degree wrenches over the 'normal' 15 degree typical combo. sometimes you need that 15 degree offset to get your fingers away from something, but i find most of the time i don't. not sure whether its true or not, but it 'seems' the non-reversibles might have a stronger mechanism than the reversible. either way, i've got a BUNCH of GW stuff, ratcheting wrenches, non-ratcheting wrenches, sockets, ratchets, bit sockets, etc. all of it has has held up extremely well and is finished nicely.
i have the 'long pattern' gearwrench NON-ratcheting wrenches as well as their XL ratcheting wrenches - the non-ratcheting 'long pattern' ones are only a small amount longer than the 'normal' ones - high quality, but not enough longer to bother with IMO. the XL ratcheting wrenches are significantly longer and highly recommended.
if you haven't used ratcheting wrenches before, its amazing how much time and frustration they can save you. you NEED non-ratcheting wrenches - just too many scenarios where the ratcheting action is annoying, but 7 or 8 out of 10 times, i reach for the gearwrench ratcheting XL set. great wrenches.
ahm