Tube pre-amp with parasound jc-1's

Looking for input from folks who use(have used) jc-1s with a tube pre (particular interested in any tube pre that has HT bypass). Looking to compare a tube pre to a ss option (like the jc-2) to get a sense of differences. Wanted to get some initial feed back prior to "exercising" a retailer on the in home demo (which I would like to pursue a bit more informed).