Both Oneida and ClearVue offer very good dust collection systems and both companies are dedicated to that, too. From there, it's a matter of preference around features and materials. I'm in the Oneida camp because I started there all the way back in 2000 when they were "the" dedicated dust collection system and about the only one who provided actual fan curves. The original one I bought is still running in a friend's shop. The replacement for that, which I actually picked up from the factory in Syracuse, served me very well in my old shop and is currently running in a small commercial operation that does van conversions. I have a used SDD in my temporary shop and when I get a building up, it's very likely that another Oneida system will get the nod, although the Harvey is 'very interesting" in some respects. Meanwhile, Clearview has a great lineup of systems that many folks find attractive and cost effective that leverage non-metal construction. For heavier needs, they do have the all metal model at the top of their range.
IMHO, you can't go wrong with either brand. Of course, the duct work will be a key factor, too, so rather than considering that separately, make your focus on the entire system.
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The most expensive tool is the one you buy "cheaply" and often...