Mel from here has Wrigglebots, which sells Pikkolos (comparable to Ergos sort of) and BabyHawk Mei Tais, and the reason I tell you that is because I have one of each and I love them and use them both for my boys. I like the BabyHawk slightly better for my 6 month old, and the Pikkolo slightly better for my 2yo, but either is great for either kid. Supportive on your back, good for your kid...

Depending on where you live, you might be able to hook up with someone who can give you a try? If you live anywhere near me you're more than welcome to try mine.