It doesn't clog easily? You just have to keep maintenence. ^^ I've had the Mag350 with Biowheel, and its an awesome, powerful filter. Many people that have negative comments simply havent had one. Sure, there are better filters, but its nice. If you have it set up with the biowheel, it does awesome mechanical filtration, and has brilliant water polishing capabilities! The plastic will be fine if you are not a clutz with it.
You will want to keep an extra smaller filter with biocubes or something in it to help with biological filtration, and maybe a biowheel setup for the magnum350. They do have the mag350/biowheel combo I believe. And it's pretty friggin quiet for how powerful it is.