"Time, design and technology have not stood still since the mid-80s"
Well, much of the movement in technology in other boats is only now
catching up with the Schumacher-Alsberg innovations of the
1980s--ultralight construction with the best available cloth and
resins vacuum-bagged.
As far as design is concerned, either a boat sails well or it
doesn't. Many current one design classes were designed many years
ago--Stars, Snipes, Thistles, E-22s. The boats are still popular
because they sail well and because they have strong class
organizations. The J24 has a strong class organization, but is dying
because the boat doesn't sail well. There is no comparison between an
E27 and a J24, either in terms of materials, construction quality or
sailing qualities. (The J22 is much better than the J24.) Right now,
in my opinion, there is only one choice in the one design, pocket
racer-cruiser category--the E27. Other one design boats in the
size-price range worth considering are the E22 or the Melges24, but
they are not suitable for long-distance or ocean races.
I've heard good things from a couple of owners about the Alerion
Express. It's a great looking boat which incorporates pretty much the
same below-the-waterline features as the the E27. However, my
impression is that the boat has attracted mostly fairly well off,
older, day sailors rather than racers. The E27 is attractive to
young, not-so-affluent racing sailors because of the availability of
good used boats at a reasonable price. Time will tell whether it will
also attract new boat buyers at $50k-plus. It should because of its
superlative sailing qualities, either with a full crew with genoa and
spinnaker or single or double-handed with main and jib. Last
September I made a full circuit around San Francisco Bay in an
afternoon with a main and #3 jib with 5 people relaxing with
sandwiches and a few beers--the point being that it is a great one
design racer and equally great day sailor or weekend cruiser.
Note: I'm from Detroit and I don't presume to be telling you what's
best for you on San Francisco Bay. However, I've been a devoted E27
racer and day sailor since 1986. There is no finer boat in this size
and price class. (I assume you have sailed on an E27, but if you
haven't I urge you to do so for at least a couple of hours in a good
breeze before you make up your mind. I guarantee you will love the
boat. If you call Gary Clifford, I'm sure he would be happy to take
you out for a sail on Light'n Up!)