SNA may be quieter and closer to DL but if it is a HUGE price difference don't be afraid to use LAX.
The only things we found a bit hectic was the lengthy waiting time to collect our luggage, and getting dropped off at the airport by super shuttle (busy area, felt rushed and nearly left something behind in van).
Fairly easy to navigate the terminal and was a breeze thru security gates. Lots of food/store choices while waiting for departure. Lots of seating and enough traffic to people watch/entertain your children before boarding.
-----------------------------------------------------------------------
The security lines at SNA are horrible! The line backs up way down the hallway, agonizingly slow and has a confusing line set up (with first class passengers squeezing past you because they could not find the right line).
We also found it was quicker to check your luggage as they hand check each piece of carry-on luggage (not personal item sized bags) and it was confusing to see where you had to wait to get your luggage hand checked (no signage.. we nearly left the area with our luggage in tow, we thought the agent was searching checked luggage not carry-ons and he flagged us down before we walked away)
---------------------------------------------------
We fly out of MSP - now that is a very confusing airport! ..walk this hall for an eternity, take tram A to point H, walk another long hall, take elevator to thrid level, walk this way, now take elevator to ground..
I kid you not, that is how lengthy it was on my last trip as I flew in a commuter plane to my small town.
They keep adding to the terminal , at least they have good signage and trams to cut the walking back! Security is a breeze there too.