I'll give a different take on this.
The question seemed to focus on taking better-quality pictures for web use.
The question didn't seem to imply that the OP wanted to learn photography in general, and become a better photographer as a craft. The OP seemed to just want better pictures that can be used in his/her web designing.
So, considering the two options:
(1) If you are, in fact, wanting to learn to be a skilled photographer and grow in the craft of photography, then I agree with a lot of the comments above. I've used Nikon for many years. I like the options of a used Nikon DSLR such as a the pro-grade D200, D300, or the pro-sumer level D80, D90. On the other hand, the level of D40, D3100, are more aimed at the level of point and shoot beginners.
(2) Alternatively, if you're not interested in growing as a photographer, but simply want good photos for use in your web development (is that it?), then there are a range of point and shoot cameras that have larger than normal sensor sizes that produce great results. e.g. a 2nd hand Lumix LX5 (new LX7), 2nd hand Canon S100 (new S110). I know the S100 and LX5 can shoot RAW files for later manipulation in Photoshop. The LX5 has a larger sensor.
The LX5 has a larger than normal sensor, and an absolutely brilliant Leica lens that is razor sharp. However, the LX5's sensor max'es out at about ISO 400 and, at a pinch, to ISO 800.
You can read reviews of all these at
http://www.dpreview.com and
http://www.imaging-resource.com