I used to have SCM19s. When looking for an upgrade I demoed lots of speakers but ended up going for actives. ATC make some very good ones that you might pick up 2nd hand within budget, I feel though that they (like a lot of hifi) are overpriced and you can get better for less money. If you value clarity and dynamics go demo some actives, you will be able to pick something up that is a lot better than what you have for less than your upgrade budget. Check out pro-audio active monitors too, I replaced the SCM19s (along with ATC amp) with Event Opals and they wiped the floor with them, it took about 10 seconds to realise how much better they were.