i know there is a rotor on sale at The Source for 80 something $
i only paid 90$ for my CM4228 in St. Catharines
i paid 30$ for a Magnavox preamp at Nutech, which has been amazing, and I don't see how it could perform any better. (the 7775 would certainly be a much better preamp and probably shows fairly improved performance over cheap preamps, but i don't see how thats worth spending 90$ extra, especially when you in Brantford where the signals should all be fairly strong.)
perhaps you should find a dealer where you can buy a less expensive preamp and try it out, and then if it doesn't gett all channels, take it back and get the expensive one.