Personally, I've been very happy with the 30lpi that's on my frontstrap. My m.h. is 20lpi, and I always hated it. 20lpi is just too much bite for my palm. It even riped a whole in my glove from all the friction. Then again, you can always deburr the points a little to make it more forgiving. I did, but it wasn't enough.
As for you, I really think it's a matter of trying one in your hand before deciding what to get and how well your going to baby your new piece. I'm not too sure what a "full house carry gun" means, but if it's something that's going to be seeing alot of action and rough handling, I would consider the 30lpi or even stippling. Stippling gives a nice comfortable grip, can be made to grip more or less based on the depth of the stamping (similar to varying lpi in checkering), and is definitely not as noticeable to wear and tear as checkering would.
Then again, checkering is just so BEAUTIFUL. Well there's my two cents.
Here's a pic of my 30lpi frontstrap. You probably saw it before in another topic.
