I have $400 earmarked for equipment upgrades. I currently have a Sigma 17-70 non-OS and an FA50/1.4 that I think I should be able to sell for $600, which would bring me up to $1000.
Otherwise, my kit includes a K10D body, the 18-55 that came with it, a not-so-great Viv 70-200 manual zoom, and a bunch of lighting stuff.
I primarily shoot candids of my kids, indoors and out, natural light and indirect flash. So I definitely need a fast standard for the indoors stuff. I also really enjoy wide angle, trying to layer objects in a scene, etc. I often use the lock switch on my Sigma cuz it stays at 17mm.
I'd also like to add a consumer-grade tele zoom for the occasions when it'd be nice to have. I've seen some 50-200's on the marketplace for under $100.
Things I'm looking to improve by upgrading:
I do a lot of wide-open shooting, and having a constant-aperture zoom would be fantastic. I'm also looking for an IQ bump. My Sigma is pretty good, but it's not amazing.
I LOVE the IQ of the FA50, but it's just a little too long for indoors. I'd do much better with something in the 30-something range. As well as something that can focus a little closer.
Obviously, I'm due for a body upgrade as well, but $1000 isn't going to nab me a K-5, and even if it did, I'd be down to only an old kit lens.
I have a few possible plans.
Plan#1: Tamron 17-50/2.8 and Sigma 30/1.4 from Tri-State for a grand total of $850, then find a used 50-200 on the marketplace.
Plan#2: FA31 Limited. It's everyone's dream lens, after all. Would the allegedly unbelievable IQ make me willing to go back to the kit lens for WA?
Plan#3: Save for a K-5. I have a Mamiya C330 that I inherited but never used. Maybe I could sell that and make up the difference? But I think I'd miss a lot of shots without a fast lens for indoors.
Plan#4: Sell the whole kit and jump ship to Canon?
Plan#5? Plan #6?
Feel free to vote for a plan, critique a plan, add your own, or ignore me entirely. The choice is yours.