I'd take the advice of one of the members here and look for a used k100d on sale in the market forum. They have been going for lower than $300 which I find it's an insult for such a good camera
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Also get an autofocus fast fifty, that is either the f 50/1.7, fa 50/1.7, f 50/1.4, fa 50/1.4. Also get the kit lens.
Try these ones out, and see if you need better reach.
If I'd have the chance to do it all over again from the start I'd get a used k100d which I did, in may. A tamron 28-75 f/2.8+tamron 70-300+one of the autofocus fast fifties and a sigma ef-500 dg st flash. Tha should fit the sub $1000 mark, just barely, but it'd be a kick ass kit.
Why the k100d? Awesome performance for the price. Simple as that. I don't need a billion mp. I need better low light capabilities.
Tamron 28-75 f/2.8. Sharp fast lens with great coverage.
Tamron 70-300, for when you need reach. It is not fast but at these focal lengths you need to spend big bucks to get a fast lens.
The f 50/1.7, fa 50/1.7, f 50/1.4, fa 50/1.4, because they're awesome for the price, just like the k100d.
Sigma ef-500 dg st. Cheap, powerful, p-ttl. People might find the build quality a bit low to pentax standards, but you'll have to be more careful.
Hope that helps!
Good luck with you decision making.
Deni