I think if you're considering spending $1800 you should watch the classifieds for a used Brytson 4B SST, which you should be able to buy around $2000, or you should try a pair of NuForce Reference 8B monos ($1600/pair). The NuForce go loud without distortion. Don't let the 100wpc power rating fool you.
Why do I suggest these options? Because with the Bryston, you will be able to re-sell it for what you paid. I did, and you can do the same. You'll have had the opportunity to hear it in your personal system vs. a dealer's showroom. Concerning the NuForce, the same theory applies, except with the NuForce you'll be able to return them within 30 days for a refund (minus shipping...6 pounds...big deal). I can think of no better way of trying two amps in your own system with less risk.
You will not be able to buy Rotal amps and re-sell them down the road at the same price. So, if you buy Rotel...and you certainly should if they provide the sound you want...plan to keep them, or be willing to accept the price depreciation.