I have a few ART312-As, and they are also great, but much heavier than your 10.
Too bad the price went up about $100 in the past few months
Another vote for the RCF ART 312As. They are an excellent speaker and have never let me down since I first got them (almost a year ago). I have used them both as mains and monitors and while I am not a huge fan of the monitor angle, it is acceptable for most applications. As mains, they have also far surpassed my expectations for sound quality and volume. I have also heard the 310As and the sound from them was also very pleasant.
Another speaker you might want to look into is the Alto Truesonic series. While I have not used or heard this specific speaker, I have read great things about them and I use the Alto SXM112 for stage monitors and they have been a real bargain at $300. I would even put them on the same level as the RCFs as far as sound quality.