I haven't had any experience with the V20 model but can totally recommend the Logitech X-140 (2.0) speakers. I got these ($50 on special) about 18 months ago when I was transiting accommodation and had no room for a sub.
I've never gone back, these things are bloody brilliant. Not as much heavy base as a sub (obviously) but I like my eardrums in one piece anyway. They're quite small and light, they use a mains adapter so that may be a problem for ultra-portability but if the V20s run just off the audio cable, they'll never have the grunt of a mains powered set. As to aesthetics, the X-140s are very nice, black mesh ~2"x8" with a slight back tilt. They have plenty of grunt to fill a bedroom and be heard in the kitchen outside my study, although that requires turning them up most of the way. I'm no audiophile to give you a dissertation on their sub-harmonic tone or some such, but I've used them for music, movies and games with total satisfaction.
(No, I don't work for Logitech, though now maybe they'll want me for marketing.)