The D240mkII is one of ARC's best SS amps and an absolute bargain here on A-gon. I've got two of them. You may also want to consider the ARC 100.2 although not sure if you can get it below $1000. Very similar in design to the D240mkII. I cannot however recommend the ARC D130 or the ARC D200/D300. The ARC D400mkII is probably the best SS amp ARC has ever made but seems to be out of your price range. I've got two D400mkIIs and nothing short of catastrophic failure requiring complete and total replacement will get these out of my equipment rack.
I have never compared the ARC SS amps to the Sunfire though. If you need more power than the D240mkII/100.2 then the Sunfire may be the way to go.
I have never compared the ARC SS amps to the Sunfire though. If you need more power than the D240mkII/100.2 then the Sunfire may be the way to go.