I have a Spacedeck, and I have used an SME IV, Micro Seiki MA 505, Moerch UP-4 and Moerch DP-6 on it. All sounded great, and only the UP-4 was a unipivot. The Spacedeck works well with any competent arm.
I have also owned a Naim ARO on my LP12, and did not like it at all, finding it thin, bright and bass light. The ARO divides opinion between those who like it a lot and those who can't bear it. Buying one would therefore be a risky proposition.
You already have a great arm and a great turntable - stop worrying and buy some records.