you live in the bay, eh? Where did you find it in stock? I too live here in the yayarea.
Brace yourself - you will undoubtedly get some jams. Break in can last as much as 500+ rounds. My Custom ii had little hiccups out until about 700 rounds. Luckily I shoot a lot, so it was only 3 range trips before I got through that. The gun shoots awesome now - the trigger is amazing for the price of the gun - at about 5k rounds now, and it breaks like glass. The action is also very smooth, thumb safety has a very positive engagement without being gritty feeling.
Document any jam you get, and if you can, take a picture of it, then share it here!
There is also a known problem with the slide lock, which has a tendency to rub on rounds as they cycle through the mag - which causes premature lock back. If this happens even once, call up kimber customer support and tell them you are getting premature lockback - they will send you a new slide lock without many other questions aside from your address.
Aside from these issues - you will love the gun - just don't get too bummed if you have some jams. I will also suggest leaving your friends at home until your gun is broken in and reliable - nothing is more castrating than your new gun failing in front of your friends - and who knows how they will address jams as they occur.
For ammo - honestly, with prices the way they are - I'd say get the cheapest 230gr ammo you can get - or purchase a reloader, and load yourself some Moly coated Lead bullets. Shoots cleaner than jacketed ammo, easier to clean up, no leading, no lead vapors and cheap(er than FMJ or plated). Even FMJ's have lead vapor, because the base of the bullet is bare lead. Whatever you do, I'd suggest avoiding TMJ or "plated" bullets - which seem to shoot dirtier than anything else I've but through my gun - and copper fouling is much nastier than lead fouling (both can occur because the plating is so thin)
My reloads cost me a touch less than $20 per 100 - and you'll find most .45acp is $20-25 per 50. With my reloader (lee hand loader + 4 piece die set) costing under $200, I payed for the reloading set up before my break in was over.