Another food for thought - do you have a good DSLR Petr? If you do then why not got for a DSLR/Mono CCD combo. Granted it'll never match a cooled CCD but depending on what you're after, it may be 'good enough'
Once in a while you'll see peltier-cooled Canons coming on here for sale, or even through other forums. They might be a good investment