Figured I'd report back with an update. I ended up ordering a matched pair of RCA 6SN7GTBs for the gain stage and a matched pair of GE 6SN7GTBs for the follower from Brent Jessee. He mentioned the RCAs would be on the warmer side of neutral compared to the GEs and that's what I'm hearing when I flip them back n' forth between the stages. To be clear both are warmer than neutral, the RCAs are slightly more so. For now I'm quite happy with this combo. Better bass rendering than the PSVane, more depth, weight, punch, and texture. Im still getting all the air and sweetness that the Freya+ provides. Going back, the PSvane's shimmer up top leans too close to glare. The top end of the NOS tubes is presented more naturally, less forced or showy. I find myself just listening verses analyzing. Best of all, these tubes were not super spendy (coming in less than the PSvane). I also picked up a matched quad of Tung-Sols, mostly because they were on sale at Viva but also because lots of folks seem quite happy with them (and Freya used to ship with them). I'll give those run soon and report back.