I would ask the same question...why do you feel you should have tried on others?
Had you asked before you purchased, I would have definately recommended trying several, including some not made just for women. Its all about getting the best for you, and we aren't all built the same.
But, seeing as you already have it, unless you have the resources to just go buy another one, or the LDS will exchange it for you, try to pin point what the problem is...maybe the LDS can help you make some adjustments to it. Or, it just may take some getting used to a new piece of gear after 15 years.
If you do decide you really to need to start again, then do some research (as you said, there are a lot on the market now) and look for "try before you buy" programs to be able to acutally dive with the gear. I have a Diva LX, and I wouldn't trade it for the world. But I tried on everything in several different dive shops before deciding.
Good luck