Alright, back to the SW-45.
Here's the deal Herman. Special Weapons makes a clone of the HK94 they call the SW5. Most of these guns are problematic and factory service is a bitch (in general they can't actually fix the gun). If you find a SW5 and run a few mags through it and find it reliable with a particular factory ammo, go ahead and buy it. Do not buy any SW guns you can't return because they are crapshoots.
The SW45 on the other hand, is not a clone of a HK anything. There is no 45ACP MP5 if you notice. To build this variant they needed to design a slightly larger receiver, make up new rolling thingies, work out the freakily sensitive timing issues, work out magazine issues, etc. By themselves. You trust SW to do this right? I would not bet $1200 on it.
I'd in fact wager you Herman a round of beers if we ever meet up that if you order that gun sight-unseen, it will arrive a piece of shit.