Sorry, I was confusing the KW 500 integrated with the MF kw550 monoblocks which are made to sit next to the speakers they're supercharging.
I think the latest version of the NuForce integrated would give you just what you're looking for. If you have a decent line stage (and the RR2150 would not be that), the Outlaw 2200 M-blocks would be good.
However, if you really want something that makes those SFs come alive and makes a minimal impact on your rack space, check out the 8.5" wide, 8.5 lb. NuForce 1A-7 V2 integrated amp. Yes, it's a bit over your budget, but I think it would give you exactly what you're looking for and satisfy you for years to come. If you want to keep it to $1K or below, try to find a recently discontinued PS Audio Trio integrated. I've seen those on closeout for around $1K awhile back, but not recently.
I think the latest version of the NuForce integrated would give you just what you're looking for. If you have a decent line stage (and the RR2150 would not be that), the Outlaw 2200 M-blocks would be good.
However, if you really want something that makes those SFs come alive and makes a minimal impact on your rack space, check out the 8.5" wide, 8.5 lb. NuForce 1A-7 V2 integrated amp. Yes, it's a bit over your budget, but I think it would give you exactly what you're looking for and satisfy you for years to come. If you want to keep it to $1K or below, try to find a recently discontinued PS Audio Trio integrated. I've seen those on closeout for around $1K awhile back, but not recently.