Sadly you are in CA so hi-caps are not really a deciding factor for you. If you were in a area where hi-caps were an option my opinion is to get a G19, 23 or 32 because you can use both mid-size and full-size hi-caps. I chose a G23 because I really like the bullet weight range of .40 (155-165gr. loads cover most everything). Another positive for me is that I can also convert to .357 Sig or 9mm* with a simple barrel change.
Some people love to bring up kaboom issues with .40 but don't let that sway your opinion. They just keep talking about the same stories or posting the same photos (some aren't even .40 S&W). When you start digging into these stories you most often find out it's something related to reloads or poor maintenance (failure to remove lead residue). Glock .40's are incredibly popular among competion shooters in various action events (this is where most kb's [b]of various guns[/b] have occured). Most competition shooters reload for these reasons:
1 - To save money.
2 - To get better, more consistent accuracy.
3 - To gain more power.
If you reload you have to be very careful!!
Reason #1 has kb risk because many people shoot lead bullets to save money and some try and strecth the brass into too many reloads. If you shoot lead in a factory barrel w/out properly cleaning it you have greatly increased the likelyhood of a kaboom. Same goes for reloading the same brass too many times or failing to inspect the cases.
Reason #2, nothing wrong here but if a reloader finds a load he likes he could start cranking out a batch and a simple error of forgetting what powder was originally in the powder drop keg, using the wrong bullets (or a new make w/ a full power load) or even simple interruptions resulting in a possible double charge can cause catastropic damage to ANY fiream!!!
Reason #3, is probably the single BIGGEST reason for kb's!!! Many people push the .40 to the absolute extremes to reach major power factors for competition plate shooting and other events. Any screwup here and a kb can happen. Weak or old brass, bullet depth seating, lead build up in the barrel, etc. could cause a kaboom! Guys testing new loads might go just a tenth of a grain too much or try a different primer or any little thing like that could cause a kaboom.
[i]* The 9mm conversion is done by purchasing a 9mm conversion barrel. With the .40 cal. Glocks (G-22,23,27& 35 also the .357Sig 31,32 & 33) the extractor comes over far enough to extract a 9mm cartridge from a 9mm barrel. You could drop in a Glock 19 barrel and it would work BUT DON'T! The factory G19 barrel has a sloppy fit though the 19 & 23 are identical in size, it'll cause un-needed battering on the slide. Various makers now produce 9mm conversion barrels, these barrels will have the proper outside diameter needed. No other parts are required other than the addition of Glock 9mm mag (G17 or 19) for most reliable performance.
Consider this conversion for practice purposes or SHTF situations only, don't intend to make your .40 a permanent 9mm![/i]