You can pick from a very nice variety of speaker models for the price you probably payed for the Rebels by going with something used but in good shape from here on A'gon or even ebay, if you're careful.
If you must go with something new, the Maggies sound like a good choice. A decent pair of Triangles might be had in this range as well.
If you want to try something a little different, you could probably pick up a pair of Ohm Walsh speakers direct from the manufacturer in this range as well.
I would also recommend the Dynaudio line as well, depending on budget, but these don't come cheap, especially new.
If you must go with something new, the Maggies sound like a good choice. A decent pair of Triangles might be had in this range as well.
If you want to try something a little different, you could probably pick up a pair of Ohm Walsh speakers direct from the manufacturer in this range as well.
I would also recommend the Dynaudio line as well, depending on budget, but these don't come cheap, especially new.