I'm about to buy another a new piece but I would like some opinions first. P2000 357 sig? or Kimber CDP Compacy? I have never shot 357 sig but it seems very intriguing. I'm leaning towards that over the Kimber especially since I owned a HK45c before

I owned a .357Sig USP for a while & used it as my CCL. I loved the ballastics of the rd but *I* couldn't afford to feed the damn thing...............    

I ended up selling it to help pay for my USP .45acp Fullsize............      

Yeah, I'd stay away from .357 SIG unless you have a specific need for a high velocity round.    The Texas Highway Patrol likes the round because it can penetrate auto glass and doors well.  I heard that from my CHL instructor, by the way, so I'm assuming it's true.  Either way though, .357 SIG is damn expensive.

Buy a .40 and get the Sig drop in barrel later.  .40S&W costs roughly 1/2 as much thus cheaper to feed and practice with.

Get a 9mm or .40. The cost of the .357 SIG ammo will make your ears bleed.

Also, in a SHTF situation, you absolutely will not be able find .357 SIG ammo. Any that is around will quickly be snatched by police departments.

I absolutely concur with the previous responses.  The .357 Sig caliber is indeed balistically impressive, but the ammo costs are simply too prohibitive.  Earlier this year, I seriously considered buying a USP Compact/.357 Sig from CDNN (they had a really good deal on NIB pistols in that caliber, and probably still do).  This seemed, at the time, like the perfect CCW weapon.  However, after researching the high costs of .357 Sig ammo (for both practice and defensive loads), I quickly backed off!   Locally, the price of .357 Sig "practice ammo" (i.e., FMJ "ball" ammo) is generally double the price of identical 9mm ammo.  As such, I ended up getting a USP Compact in 9mm as my carry piece and I'm very pleased with it.

Essentially, the .357 Sig bullet is really just a high-pressure 9mm round to begin with, albeit in a "necked-down" shell casing.  The ballistic advantages of the .357 Sig cartridge over the 9mm can just about be acheived in the latter caliber with the right load.  For example, my 9mm carry ammo is Winchester Ranger-T 127 gr. +P+ (RA9TA)...this 9mm load just about replicates the performance of comparable defensive loads in .357 Sig (RA357SIGT), but at a lower cost.  In fact, if you take a look at the cartridge comparison tool on the Winchester LE website, the RA9TA load equals or surpasses the RA357SIGT load in several tests (namely: bullet expansion, bullet penetration, and bullet weight retention).  Go here Winchester LE Ammo Comparison Tool for more details.

Furthermore, the much wider availability of 9mm ammo is a huge plus for me!  

.357SIG Ammo prices:

Personal Defense  Hornady XTP  $12.84 for 20
Practice  S&B $16.57 for 50
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9mm Luger Ammo prices:

Personal Defense  Hornady XTP $12.37 for 25
Practice  S&B $9.14 for 50

I can buy 9mm 115 gr. practice Blazer aluminum practice ammo for $6.87 for 50 rounds (at Academy Sporting Goods) and Blazer brass practice ammo for $7.67 for 50 (at Walmart).

.357 SIG ammo is about $22-24 per box of 50. While .357 SIG is a great round, I really like to shoot, so 9mm is the round for me.

There is not much difference in price between the two for carry ammo. Winchester Ranger 9mm is about $20 per box of 50, and .357 SIG is about $24-25 per box of 50.

I order my practice ammo from Georgia Arms Their "Canned Heat" is good clean stuff that is LOUD. People will know you are shooting .357sig. Usually with group buys it is free shipping too.

no one reloads? if ammo for the 357sig costs too much- reload it yourself.

I like the round, good speed.

I currently carry a HK P2000SK in 357 Sig and I really like it.  It has a bit more muzzle flip than I expected and it is  louder than a 9mm. At first I seemed to be all over the place with it, but once I got used to the long trigger pull, my groups came down to a reasonable spread. I have to admit that I haven't paid much attention to the price of ammo though. Anyway, its a good weapon, you won't be sorry if you decide to go with it.