Hello guys, as said, my first thread and I hope I can get some good advice on what lens to choose:
First off, let me introduce the candidates (feel free to suggest more as suitable):
Budget:
EF 28-135mm f/3.5-5.6 IS USM
EF-s 17-85mm f/4.0-5.6 IS USM
both around 280 - 300 pounds
Investment:
EF-S 17-55 f/2.8 IS USM
EF 24-105 f/4.0 L IS USM
both around 700 - 800 pounds
What I currently have:
450D with kit lens
50mm f/1.8
EF-S 55-250mm IS
580EXII :P
One thing is, I am looking to REPLACE my kit lens, and maybe selling it to get some money for the replacement lens. Two things here:
1) would you guys suggest selling the 18-55 kit lens when buying "investment" lens as replacement? Its not like a somewhat 90 pounds would matter that much when buying an 800 pounds lens.
2) I tend to think 18-55mm is limiting especially on the 55mm end, its rare that I will NEED the 18mm end unless I am in a very small room or need it for f/3.5 + cropping.
As said by others, buying "compromise" lens like the budget ones I have listed, I am only going to end up selling them again. (although maybe not in years) Would you guys say its a big mistake to buy one of the budget lenses, sell them after few years and upgrade to the two investment lenses? Should I go straight for the higher end one?
I can afford it, but being a student its an extremely big purchase. Considering all my gears worth in total about 1100 pounds, a 800 pounds lens feels like I'd be better off getting a new camera body for the lens lol.
So if you guys will, please give me some advice and suggestions. Budget vs Investment? And also, which lens is better?
I have heard that the 17-85mm has a soft wide end, how would it compare to the highly rated 28-135mm ? I hope the 28-135 is more well-built since it offers better range as well, and like I said, I rarely NEED 17mm, and 28mm is usually wide enough anyway even on my 1.6x crop 450D.
comparing the investment lenses, the 17-55 will definitely be a good lens to have with f/2.8 and IS, but the range suffers the same problem. Since I have a decent 580EXII flash and at 17-55 usually things are in reach by the 580EXII. I hope the 24-105mm L will be a good investment for all-in-one walkaround.
Thanks in advance for the help. Stickies are really helpful, but some update would definitely help 



, now have 400do;500f4is,600f4 
