It will give you a taste of what the 2a3 will do, but in the long run you'll be looking for either a different amp or speaker. I'm currently running a 2a3 with an 89dbw meadowlark and it's close at low volume, but not advisable. Given your room size and musical tastes, either start thinking about new speakers, or look for more power in a 300b.
2A3 amp and Spendors?
Has anyone had experience using a 2A3 amp with Spendor 2/3 speakers? I have a medium size room approx.15 by 15 and listen mostly to classical, acoustic jazz, and vocals. Occasionally I dig up an old rock album. I don't usually listen with the volume high but I do like for dynamics to be present. Thanks in advance.