The Arcam is not bad, but its not great either. partnered with the arcam amp it sounded very digital, itchy! it didn't sing. i'd replaced an Arcam dv88 as the dv79 has hdmi. the dv88 was far better with music. so, i always considered the Dv79 the weak link, and was the first piece of kit i upgraded.
the Rega Apollo is better in every way. an absolutely marvelous piece of kit. for producing music it is the dogs wotsits. it can be a bit temperamental, it doesn't always do what it is supposed to do. but i think that makes me like it even more!
if i were to replace it, i'd definitely go rega again. possibly the saturn-r. the sound is addictive. i've probably doubled the amount of music i listen to since buying it, it had that much of an effect.