Welcome to POTN...
What lenses and camera do you already have?
Does that $1300 include the camera, or just the lenses?
Either way, you might want to forego the 7D. Unless you do a lot of sports/action shooting, for the types of shots you cite with 7D you will be paying extra for features you're unlikely to need or use. 60D or T2i or the new T3i all can give you exactly the same image quality for considerably less money and leave you more lens budget to work with. Lenses will make a much more difference in your images, anyway, than the camera body you use with them. Unless you really need to make really big prints (or crop a whole lot), you could even consider lower resolution cameras such as 50D, T1i, 40D, etc.
On any of these crop sensor cameras, the Canon 10-22 ($850 w/hood) or Tokina 12-24/4 ($500) would be my top choices for a wide lense. Neither is a fisheye, though.
For a "walk around" lens, at the top end, choose between the 24-105/4L IS, 24-70/2.8L IS ($1050 and $1330 respectively). Yes, there are some third party alternatives. I haven't used them, will leave it to others to advise.
For a cheaper walk around alternative I often recommend 28-135 IS.... Which sells in stores for $470 (w/hood) but, because it's been sold widely as a kit lens, can often be found very lightly used for $250-300. It's quite a good lens optically, EF, mid-grade build, with USM and IS. Frankly the 28-135 IS is so good optically, in build, etc. that I couldn't see paying $1000+ for a 24-105/4L IS . I did buy and use a 24-70/2.8 because it's sealed better against dust and is more durable, and my lenses don't lead an easy life.
Particularly if you get the 28-135 or 24-105, you may want a lens with a larger aperture for portraits and low light shooting. Canon 28/1.8 ($500 w/hood) or Sigma 30/1.4 ($440) is useful for group shots or tighter places. Canon 50mm (f1.8 or f1.4, $135 and $400 respectively, w/hood), Sigma 50/1.4 ($500), Canon 85/1.8 ($425 w/hood) or Sigma 85/1.4 ($900) are the more traditional "short" and "long" portrait focal lengths.
Yes, you could go with a 17-55/2.8 ($1150 w/hood). It's not terribly wide or long, so you'd still probably want one or more of the primes mentioned. For a wider lens to compliment it you might get the Tokina 11-16/2.8 ($600) although I personally don't see much need for f2.8 on an UWA, especially if it costs more and ends up with a super narrow zoom range as a result. And you'll probably still want a longer tele.... perhaps the Canon 70-200/4 IS ($1280 + $140 if you want the tripod mounting ring).
I haven't even touched upon fisheye lenses yet. You might be able to manipulate wide angle shots with some software to get fisheye-like effects (perspective and warp controls in Photoshop, for example). If you still want a fisheye lens, there are a number to choose. I condsider fisheye pretty specialized, though. Perhaps the most useful would be the new Canon fisheye zoom (t'aint cheap!) or the Tokina fisheye zoom. Most are single focal lengths (primes)... Canon, Sigma, etc. There are vintage lenses that can be adapted, too.