Having the same problem getting a printer to handle my thick cardstock. I just bought my first laser printer last month and I'm currently trying to sell it (let me know if anyone is in need of a color laser printer, works really well, just not for really thick cardstock). I went back to my old Canon Pixma, working great, but going thru ink like crazy.
I do have an Epson inkjet that I love, but it has finally stopped printing any cardstock. It still prints really beautifully though. I use it for all my stickers, address labels and photos (on Epson paper).
Hope this helps!