valve phono stage would be nice but 250 might be pushing it a bit, the project one is good but better if you change out the stock tubes but again more money, i like valves and vinyl but there are some nice solid states out there, rega's own ones for example but you should have a least a short list and audition some with your kit which most dealers look like they would have considering what you have, does your arcam have a phono stage already built in, i assume you have tried it if it has but if not it might be better than the 540.