@immatthewj - I seem to have a gut feeling that Cary would be a great option for me. The SLP 98L gets a lot of good reviews and one is available for $2,000. I'm not sure that I would like the exposed tubes. I just read something from a old Audiogon post describing the SLP-70 as having a warm, old school tube sound.
As I typed previously: I've no experience with the 70 OR the 98, but based on my experience of going from a modded SLP90 to a SLP05, I suspect the SLP98 would outperform the SLP70 hands down. If I am not mistaken (and I well might be, so you might want to look at some reviews for the SLP70) it was one of the first preamps Cary ever came up with and kind of an entry level one. I think Cary preamps progressively got better and better. What I have read, here on A'gon, about the '98, is that it has a "sweet" sonic characteristic, which to some probably means warm. As far as the exposed tubes, I guess that's a practical matter as well as personal preference. Preamp tubes do not get blazing hot like amp output tubes do, but still, they are sticking up there, and if there are animals or children who are apt to mess around with them, well, that is a real consideration.
The exposed tubes has become another characteristic of most Cary gear, and it is actually one that appeals to me on an aesthetic basis, however I can see it may not be for everyone. I will say this about the exposed tubes, it does make rolling tubes and/or troubleshooting a tube easier.