Tinkered with TI's Filter Pro software last night. I've had it installed for a good while so I probably need to update it, but it still seems to work fairly decently. As long as you don't put hyphens where it wants numbers, things should be fine. ;-)
I had it design me a couple of two-pole filters, since they only take one op-amp each. One low pass and one high pass with 600Hz cut-off points. I chose sallen-key chebyshev filters since they looked pretty good (and simple). Just two resistors and two caps per op-amp does it. This gave me a chance to actually use my ancient protek signal/sweep generator for once. I don't have the equipment or inclination to fully verify the performance, but I can say that with ordinary 20% ceramic caps and 5% resistors I'm happy with the results. ;-)