Thank you very much for all the responses. I'm slightly put off by the description of Seche Vite being gloopy.
I read the reviews on the site, which are so contractictory they're really not much help.
I think I might get the Seche Vite on ebay and try the Nails Inc base/top coat set which is on Waitlist on QVC. It seems like a good deal compared to Nails Inc's own prices.
Then there's the Leighton Denny...
Incidentally, it occurred to me to look at my stash of nail goodies to see if I already had any of this. I have hundreds of colours from my last big enthusiasm, most of them separated and soupy now. Plus seven different fast-dry sprays (most of them bought in France when I find I've forgotten to bring one.)
Oddest thing in the collection was a face mask for nails which also came from France, and you put it on the nail then peel it off.
Oh, and I discovered my Shavata tweezers which have been lost for about three years, so that's something...