if it can do 15hz ? You do all the emulation you want, run older games in progressive native res , up to 220 lines, ( work fine for most horizontal mame, nes, genesis, tg-16 ) and for snes and above, you can do 640x480, but it will be interlaced. ( personally , I can't stand interlaced. )
but.. IMHO , 170$ is too much for a tube that only does 25hz . I just bought a used tri-sync 27" kortek for 200$ shipped on ebay. it can do 640x480 or 600x800 in progressive scan