Is the 7D worth it?

[Tannin]

I think your key consideration, 98k, is whether regard image stabilisation as a useful thing. If you do, then consider:

• 17-55
• 15-85
• 24-105
• Sigma 17-70

If you don't, then you probably need speed as a priority, and you would consider:

• 17-55
• 24-70
• Sigma 17-70 (maybe)

Note that some lenses appear on both lists.

[fabian628]

I have no decent glass below 100mm making close-ups (MotoX), pit lane, and general automotive shots pretty average with my kit lens. That's my main motivation for gettting the 24-70mm.

If you are after shallow depth of field and good IQ you could try a standardish prime like sigma 30 or canon 35mm. f/2.8 on crop body does not give very shallow depth of field, f/1.4 would be much better suited to this

[KeeFy]

If you do motorsport. Get a better lens. 70-200 or a 100-400L.

The 600D is more than capable.