I've had more than one Luxman preamp over the years: I gravitate to the brand. As to Guy's question, C-1000 vs C-02, I had the C-02 — and high hopes. Gorgeous looking, but to my surprise I didn't like it at all, a flat lifeless sound. Very disappointed. At the same time, I had the Luxman 5C50 pre (the Lab Ref series) Blue Shadow mentions, and there was no comparison: the 5C50 is one of the best SS preamps I've ever heard. I loaned the C-02 to a friend, who was a reviewer for well-known audio magazines — he was really keen to hear the MC stage, but he shared my disappointment. I never heard a C-1000 so can't advise.
Shadow also mentions the CL-34 and CL-35III. Through some lucky synchronicity, I had them both at the same time. I had three friends, a "jury of golden ears" (musicians, sound engineer) to help me evaluate. We played their own recordings, which of course they knew intimately. To my surprise, they all preferred the humble 34 to the famous 35III — as one put it, it was "great music" vs "great Hi-Fi". He was violist with the Berlin Phil and we were playing a Bruckner Symphony he was part of. These guys often heard dramatic differences where I heard no difference at all, but this time I agreed — and I really wanted the CL-35III, the price was silly-low and it even had the rare plug-in silver-wire MC SUTs at the back. But I parted with it, and kept the CL-34. I still have it, 20 years later. It always satisfies.
None of these anecdotes help the OP to make a decision, except that I and an astute friend both nixed the C-02, for what it's worth...