I installed an HRV a few years ago. Now I'd never consider not having one (ie., I'll put one in any house I ever live in ... whether I have tanks or not. I like having the HRV *that* much.
) No really - seriously ... as stated it really is the best option. Not cheap, but you can save a lot by going DIY. Think you can even find HRV's at Home Depot/Rona/etc.
Dehumidifiers are noisy and clunky and only produce a localized effect. They can help a bit though, in a pinch. But they don't hold a candle to an HRV.