I have the G30 SF...basically the exact same thing minus 3mm of grip...absolutely an excellent firearm. 10+1 of 45ACP should do the trick should you ever need it, but if you live in a free state (I live in MA) you can get G21 13 rounders as reloads if you so desire (I'm pretty sure, anyways). Recoil is extremely manageable for such a small weapon, and it is probably more accurate than almost any shooter. Mine is just about as accurate as my 1911 out to about 15 or 20 yards, and then the 1911 does take over a little bit, but at defensive ranges inside 10 yards you're good to go, and I have heard people claim that it is one of the most accurate Glocks. Not really sure how this can be measured, but personally I shoot it much better than the others I've tried other than the 21 SF, which is basically just the bigger version of the same gun. It has been 100% reliable with anything I have put through it, although I only have about 1000 rounds through it so far.
Some find it a little big for their hands, so make sure you hold it and stuff before you buy it (maybe even shoot it if you have a chance).
As far as carrying it goes, I carry mine whenever I can, and I have not had a problem with concealing it in my Blade Tech Nano IWB holster. It is a little on the wide side compared to some others (1911s etc.), but I just put it at about 5 o'clock or so instead of directly on the side of my hip and it pretty much disappears. You can also get 9 round mags that don't have a 3rd finger rest that can make the grip that much smaller and thus make the gun that much more concealable (I don't use them, at least yet, as I find it to be fine with the 10 rounders).
As far as price goes, I can't really speak too much because the problems between Glock and the Mass AG keep us from being able to buy new Glocks at our FFLs. If you want to check though, check out budsgunshop.com...they usually have some good prices on most everything apparently because they do pretty good volume, and if you found a (substantially) better price (and live in a free state), you can probably buy it from bud's and have it transferred through your FFL.
The only other gun I would look at in the same area would be the M&P 45 compact...they're proving to be excellent guns, and it is just a little bit smaller/slimmer I believe, and is a good option if Glock ergos aren't your thing, and I think they can be had with a thumb safety if you would feel safer with that option. I've heard good things about the Kahr line, but I have no experience with them, so I can't really say. If you have a little more change to burn you can check out the HK45c, but its a pretty different animal (DA/SA etc.) and it's not the smallest compact out there.
In the end though, you won't go wrong with the G30-it's just an overall great gun.
