magic CAM and all other variants of the matrixCAM family is almost dead or dying. you can get a lot of other softwares with a CAM slot and CI slots plus emulation enabled. best to go for Humax5400z.
if all you want to do is watch channels WITHOUT SUBSCRIPTION, then there is no need for you to buy a receiver with CAM/CI slots. just buy pure FTA with patch like hivion, metabox1, etc. almost all channels can be availed on patched FTA receivers, just like if you have a CAM like magic, matrix or dragonCAM.
so i suggest you start with the basics, at least if you damage it, the effect on your pocket financially won't be that much compared to if you damage a more expensive receiver.