Haven't owned a 30 but I have owned a 19, 21SF, 22, 26 and 34.

Only one left is the 26.

I can carry it IWB with a T shirt and bend over without any worries of printing. Same holster with the 19, more printing. Plus I can shoot the 26 very well. I preferred the 22/34 size grip to the 19 for everything but "I can't print at all" carry which as I already mentioned the 26 is better for.