You never know, maybe the bars will be good for you. I know my "G" bars are pretty comfy, but after an hour os so I get "numb finger", so I decided to get something a little different.
Most of the time, unless you wish to alter your position on the bike, a simple adjustment up/down in angle does the trick.
Last weekend I was out cruising the local yard sales, and there was a kid there trying to purchase a roto-tiller from the owner. Except he only wanted the massive ape-hanger type bars from it, not the machine itself!
They were in a similar vein as these:
When the owner of the machine asked him why he wanted just the bars, the young lad responded "I want to make my Yamaha look like a Harley."
Yeah, good luck with that.
As you said, get some time in the seat, and adjust the current bars for maximum comfort, then decide from there. It took me a year and a bit to finally pull the trigger and order different bars.
Besides, bars are cheap and plentiful. If it takes you a few tries to find the ones right for you, then you can usually get pretty close to what you paid for the other ones by offering them up here, or on ebay.