Hi Richard,
Yep, the MJA's (both of them) have come, stayed and been sent packing off to good homes all within the space of well less than 12 months. TBH, I didn't really think they were out of their depth in my system, they were doing a surprising job for the money I thought. I'd not hesistate recommending them to anyone looking for a sub in that price bracket, they are very good value for money IMO.
I'm currently on a bit of a combined (financial) downsizing and box reduction crusade with my system. The 3 box CD player is going to be giving way to a one-box (or two box) player soon. Amplificatoin has already gone one box. And the subs went in the end because ultimately I couldn't get them to integrate with the main speakers as well as I would have liked, but also luckily I've found some other ways of getting some decent bass out of the exisiting speakers (still currently work in progress though, but it's getting there
). The room wasn't as much of an issue as I'd thought, it was more of a case of the drive units on the speakers needing to be better controlled.