The Groove is a great knife, I was just comparing my 1730 to the pics of the 0600 and I realized the blade profile is nearly identical, only the jimping and striations are different.
Also interesting, as I recall, the Groove was considered a frame lock that had G10 overlays, and not a liner lock.
I briefly had a DLC Tanto Groove; for a day after Blade 2011 (thanks to the kindness of RJ). I thought it was a really nice knife. I ended up giving it to a soldier I met on the plane back to Miami, he was on a short leave home before heading back to the sandbox. I surprised him with his choice of RJ Kershaws that I had in my bag, orange or black Zing, Chill, Volt 2, or the Tanto Groove. Didn't take too long for him to decide, the grin on his face when I pulled it out of the box gave me all the answer I needed. Hopefully it served him well (and continues to) and hopefully he's home by now.