wattage difference between SS and Tube

Tubes generally have less power (about half) than comparably priced ss units, because the parts for a tube amp just cost so much more. Transistors are superior in performance for less money under most circumstances. I'm not a tube fan for the most part, but with Theil's I'd just get a nice SS regardless of where one sits on the tube/ss issue. The 1.6's are more efficient than most of the Theils have been historically and don't have quite as brutal an impedence curve-90db sensitivity and 3ohm minimum-but they still aren't a super tube friendly load. 10 watts will get you to 100db, 50 watts will get you to 105db, 100 watts will get you to 110db with those 1.6's. So a nice quality 50 to 80 watt amp would be the ticket. It all depends technically on how loud you want to listen.

If your serious about getting a Jolida then you should seriously consider buying the 502 instead of the 302. If I recall correctly the 302 uses ( only ) el-34 tubes, while the 502 will use either 6550's or kt88's. I think you will find the kt88's sound best in Jolida. When I did a a/b demo of these two amps I found the 502 was much more musical than the 302.

Don't be too serious buying Jolida since you can easily get dissapointed. Research Counterpoint amps or VTL(ST 80 in my mind). There will be better investment for SS amp with the same price as Jolida.