I like the articles! Very nice. And it's so great that you're doing this for a print comic shop, trying to get webcomics involved and recognized.
If you want a recommendation for a single review, you should definitely check out Cucumber Quest (http://cucumber.gigidigi.com/archive/page-188/). It's been making HUGE waves in the webcomic community, it's very funny, and the art is beautiful. I think it'd be interesting to note how the art quality accomplished by a single person like this can rival that of big Marvel/DC teams simply because of a different style.
If you want a good Two To Review: you should compare Paranatural (http://paranatural.net/) to Vibe (http://www.vibecomic.com/). They share a similar concept of being comedy-action series about a young boy gaining powers to fight spirit monsters with, but they handle it in very different ways. They're also both very very enjoyable.