Not having a TW endorsement isn't a big deal. 10 hours +/- of training is all you need and who among us can't benefit from some extra training.
Some will say your insurance will be higher with the TW and they are correct, for about the first 100 hours or so. After that, your insurance will pretty much run the same as having tricycle gear.
Once you build up some TW experience, you can fly pretty much anything you want. I have logged time in many very cool TW aircraft over the years because of my experience; Stearman, Chipmunk, J3, Tcraft, Champ, and many more. If I was a tricycle pilot, that wouldn't be possible.
Then there is the option of doing three point vs. wheel landings that the TW version gives you.
The drawback is that you might ground loop; however, with the A model, there is a chance you might flip over.
Go the Never Ending Debates section and change the settings at the bottom to display some of the older threads. This discussion has been hashed out many times before.
In the end, it is up to you to decide to build the airplane you will be happy flying. I wouldn't let the lack of a TW endorsement hold you back. The training is fun and about four to six hours in you will be pulling your hair out and then it will just click and all will be good.