Humm, I routinely use Ilford WT developer with WTFB and I certainly wouldn't call it sepia. Warm, certainly, but still with a bit of olive I prefer to remove. 15-20 seconds in 1/8th strength brown toner does the trick for me for a subtle brown I like very much. If I want a more overt brown/sepia I tone longer and/or in stronger toner.
I used to prefer cold tones but have been on a warm tone kick of late. I find I like cold tones for some things (landscapes with lots of water or rocks or sky, for example) and warm for other things (most portraits, architecture or still lifes featuring prominent wood, some landscapes with trees etc.) What I don't have much use for most of the time anymore is a neutral tone.
I've been meaning to try MGIV Cooltone RC - if it's as cold as I've read I could really like it for some things. I'd be more enthused about trying it if I knew I could get it in 16x20 if I liked it (which I can't) and in FB (even more so and ditto.)
I recall reading that Kentmere FB gives a good cool tone in selenium. Need to try that.
I received a print on ART 300 via the print exchange on FADU and it really looks like a great paper. Another thing to try in my "abundant" darkroom time.
BTW, I see this always written in all caps, ART. Is "ART" an acronym or is there another reason, or no real reason?