I currently make beer money on my blog (about $30/mo), and a non-trivial chunk of my content is deep analysis/reviews of esoteric products (an awful lot of cheap Chinese electronic gizmos, some of which are awesome, some of which are pure crap), and I'm usually above the fold for searches on these products. They're just really, really niche.
I mostly do my links to eBay (mostly because I buy the bulk of my stuff off eBay - Amazon is great for onesie twosies shipped from the US, but I don't care if stuff takes a month to get to me, and I'm usually buying 5 or 10 of an item at once, or just things I can't get on Amazon).
It's hardly worth my time in terms of direct advertising/affiliate income, but the blog has opened up a lot of neat opportunities I wouldn't otherwise have (such as being able to call myself a paid author - Make Magazine paid me for an article a few months ago). And it has greatly improved my writing skills and the ability to bang out a lot of content.
If you're confident that you'll be topping search results, go for it. I host my stuff on Blogger (a Google blogging platform) because it's free, it integrates with AdSense easily, and they can scale trivially to match load. My normal traffic is 500-700 hits/day, and if I write a post that goes bonkers (say, 900k hits in the first day), I don't have to worry a bit about handling the traffic. That's nice, and since my hosting fees are zero, it's not like I'm having to pay for servers. The downside is a lot less flexibility in terms of layout, but I just don't care that much.
I don't think you're likely to make big bucks doing it. But if you set up a free blog somewhere, give it a shot and see what happens.
Now, that said, I hate "spreadsheet comparison" review sites. They usually consist of, "All these things are awesome, but this one has bigger numbers, and here are links to buy everything." They're a waste of time. If you're going to offer recommendations, actually use and compare the products, and be willing to say, "This is an utter piece of crap that you should never buy." Try to be entertaining in how you call something rubbish.