Does anyone know if these speakers are any good or not? Pairs of them are going for about $65 on eBay so I thought about buying 4 of them to use as my fronts and rears. I am pretty happy with my center channel speaker so I think I'll keep that, but have some really cheap bookshelfs as my others. They look appealing to me because I am in a dorm and smaller speakers are always a plus. Any comments about these speakers would be helpful. I am using a Yamaha HTR-5560 as my receiver.