Glock 19 Meanderings

I am thinking about trading in my Glock 19 GEN 4 for a Glock 19 GEN 3. The reason being is that I thought I liked the smallest setting on the GEN 4 w/ out backstrap (and I do). But, I shoot it better with the medium backstrap, which makes it about the same size as the standard GEN 3 grip. However, the GEN 3 grip feels slightly (ever so slightly) smaller than the GEN 4 medium grip and is more comfortable for me.

It is a toss up for me whether or not I like the increased rough texture on the GEN 4. I like it, but I am fine with the GEN 3 grip as well, and with a lot of shooting it is not as abrasive as the GEN 4. Additionally, I like the idea that I would have GEN 3 parts commonality with a 23 GEN 3 that would be lost in having the different generations. So, although the GEN 4 shoots very nicely, I am thinking about trading it in for a GEN 3.

Any thoughts and/or similar experiences? It might just be more cost-effective to keep the GEN 4 and get a used GEN 3 to compliment it.

Also, has anybody had experiences with the 9mm conversion barrel in the Glock 23?

If I had a permit that was ready and the extra holiday cash, I would definitely consider that green one that Old School has listed. That looks pretty sharp.