I can't advise you on the Arcam player, but I own Spectral electronics and have heard Spectral amps and pre's with about a dozen front ends, including recording equipment and mass market players. Spectral amps normally maintain their character of neutrality, speed, detail, low noise, etc. in the combinations I've heard, however, they do not camouflage the cd or player performance or sound, so it's best to stay with a front end having your same 'maximum information, minimum fatigue' requirements.
Also, the very holographic and detailed presentation with end-to-end Spectral/MIT is dependent on the 2000/3000 combination ( IMO, one of the most refined front ends available) ,the best in MIT cabling, and the overall system design compatability, so it will not represent the sound of other combinations. But I've also heard raves about Spectral amps/pre's configured with SACD, dCS, and Wadia, so you should make a point of hearing the Arcam and Spectrals together.