Don't think I'll buy an Opamp amplifier like the Rudistor for that kind of money. That's about same amount as WA6 with parts upgrade. I think tube tech is very mature and I can imagine listening to a well designed & simple hardwired tube amp a decade later but Opamp technologies changes so fast. If I get a ss, it'll be more out of convenience than sound quality, so likely to be something compact and low cost like the chip amp based VHP2 or discrete class A PH1000.
A new HA-1A sells for around USD500 or less in Asia but I'm not sure if there's a dif in the type of stock tubes used. Except for the Mullard CV4004, the rest of the tubes cost less than $200 total. Besides the luscious midrange in triode, I like the very narrow footprint that allows me to use it as a phone stand. It also matches my 880's color & finish perfectly.