Hi Brian, I was in your situation earlier this year, and here's what I did (sort of long-winded!)
I was torn between the LN saws and the Japanese saws. Since I live in Alameda, I'm able to visit the Japan Woodworker to test-drive their saws. They have all of their Japanese saws out on a counter with scrap wood so you can sample how they cut. I chose to get the japanese saws and bought 2 of them (rip and cross-cut). They cut very nicely, but using a japanese "pull" saw is very different and takes some getting used to.
Last summer, I took a course at the NWS with Christian Becksvoort making a shaker clock. We hand-cut the dovetails in this class and I was the only one with Japanese saws. Most everyone had LN saws including Mr. Becksvoort. (see
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if you're unsure who he is)
After all that, I found that the Japanese saws are so thin that they will tend to follow the grain of the wood sometimes when cutting dovetails because of the shallow angle. Does this make sense? I found that I struggled to make a straight cut because the blade wanted to follow the grain of the wood. Granted, my technique was probably as much of an influence here as anything, but it was difficult. I tried one of the LN saws and did much better, so I have since bought LN saws and use them now.
In short, both are good, but there might be a greater learning curve with the Japanese saws than traditional saws. Also, you don't sharpen Japanese saws; you replace the blades. I'm not sure how much of an issue that is for you.
I hope this helps you.
Mike Dembroge Alameda, CA