Looking for recommendations

I have an old Meade DSI and want to upgrade to a new imager. I would appreciate
your hardware + software recommendations. Here are my specs/requirements:

- Must be compatible with Windows 7 64-bit architecture
- Preferably monochrome
- Preferably 1/2" sensor or bigger
- Exposure time from 1/1000 to at least 10-15 min
- Capable of producing "fits" files
- At least some basic image processing capability (stacking, alignment,
brightness, contrast, gamma, etc.)
- Cheap (wishful thinking ....)

Your input based on hands-on experience will be greatly appreciated.

S. Bucki

Hi, now much do you wish to spend? Do you already have a filter wheel and filters that would work with a 1/2" or larger chip?