Quicksilver's Linestage is also an excellent (tubed) pre and can be had on the used market for around $550-650. I'm currently using a prototype built by Dan Wright (Modwright) in my home system that uses two 5687 tubes and is downright wonderful in my system (Quicksilver MiniMites and Soliloquy 5.3's). I don't know if Dan is still selling any of the prototypes as he was getting ready to go into production with the design last time I communicated with him, but if he still has any of the prototypes they'd be an excellent choice IMO and an absolute bargain with the deal he was offering on the prototypes (his projected price for the production unit was around $1200.00 as I recall). For a bit more money I also like Cary's SLP-50A, and I've seen them occasionally going for bargain prices.
Marco
Marco