Here hey are in order of [p]lanned purchase
S&W 617 with a 4 inch barrell (10 rds)
Browning hi power 9mm
S&W 357 magnum Model 686 with a 4 inch barrell
SA XDm 9mm
Colt series 70 government model 1911
Remington 870 special ops tactical model
Others i will probably buy
S&W MP R8
S&W GOVERNER
The S&W Model 617 is an excellent choice. I have one and it's a tack driver. But it's also pretty darn heavy for a .22 LR, even though it holds 10 rounds. The 4-inch barrel is the better choice with the 617 for an all-around enjoyable rimfire. Those 10 charge holes take a bit of time to load too, unless you opt for a speedloader.
The .357 Magnum
A four-inch 686 is a good, safe choice. But what is your intended primary use for it? This is a full size "service weapon", so it will likely fill your need for home defense, target shooting and close range medium game hunting. And if you're planning to hunt with it, I'd opt for either the Ruger GP-100 or a S&W Model 27, either with a 6-inch barrel.
The .357 really comes into it's own with a 6-inch barrel. Then it can be used for hunting larger animals than light deer, such as Boar, Deer, Black Bear, and cougar (all where legal of course). The extra barrel makes longer range shots more certain and with more velocity.
If you're looking for home defense and/or target shooting, save some money and buy a K-Frame .38 Special instead. A 4-inch K-38, like the Model 15 or 67 is very accurate for targets, cheaper for range practice and suitable for defense with +P ammo. A good used one can cost you from $300 to $499 depending on model and condition. That'll save you several hundred off the 686.
S&W Model 15 and Model 67 (Stainless)
You list two excellent 9mm pistols and the Colt 1911 .45 ACP in your buy-list. That's fine, but consider that you can find a Colt 9mm Commander or steel framed Combat Commander to do almost anything the XD or Browning can do. It also gives you 98% common parts between two calibers. That simplifies spare parts, but more importantly, gives you the same grip, same manual-of-arms for two platforms. Consider this idea, unless you really have a love-affair with one of the other two platforms.
Colt 9mm Combat Commander Series 80
Also, don't overlook S&W's excellent 1911 line of pistols. I prefer Commander length (4") pistols and their lightweight model works superbly for me. And the S&W 1911's are available in both black and stainless.
S&W 1911Sc Scandium Lightweight, 4" barrel
12-Gauge Platform
If you're going with a Remington 870, you want the
Police model, not the Express model. The 870-Max or an 870P with an 18-20" barrel with a 2-3 shot extension are good choices. See
RemingtonLE.com for more info.
On the other hand, Mossberg shotguns can save you quite a few bucks over the Remington and provide different "tactical" options. I would not overlook their line of shotguns.
The Missing Gun
Do you already have a rifle? It's absence is conspicuous on your list. Depending on the desired use, a good bolt rifle or semi-auto magazine rifle can be added to the mix. For a precision hunting/target rifle, it's hard to beat the .308 cartridge today. The Remington 700 platform is a good choice, though examine the Savage line too. In a semi-auto, the M1A would be my choice. For a combat rifle the AR is quite a good platform in either 5.56 or 6.8 SPC. And even though the cheap mil-surp 7.62x39 Russian ammo is all but gone, an SKS or AK is still an effective but modestly priced rifle.