I'm going to go with bestbang4thebuck here - either the 990/7075 or 990/7125 combo would be a great combo, probably yielding more overall sonic benefits than adding an amp alone. Also, when you get the combo you could put the HK on eBay or somewhere similar and sell it if you want (might help pay for the extra $200 to get the 7125) or have it to use somewhere else...