Roger, I think you are looking at speakers that outclass your HT receiver, by a lot.
Personally, I'd be inclined to upgrade your HT receiver first, then decide on a speaker upgrade if necessary. Speaker choice is a personal thing, but whatever you choose, you need good electronics to drive them.
The Arcam is a nice piece, but has had a lot of quality issues - make sure you have decent warranty service near by. Also look at the higher end NAD - T775HD2 - modular design and more reliable.
Personally, I'd be inclined to upgrade your HT receiver first, then decide on a speaker upgrade if necessary. Speaker choice is a personal thing, but whatever you choose, you need good electronics to drive them.
The Arcam is a nice piece, but has had a lot of quality issues - make sure you have decent warranty service near by. Also look at the higher end NAD - T775HD2 - modular design and more reliable.