I haven't ruled out the E60s, but didn't add them to the short list because:
1. Very expensive compared to the others under consideration; would be more likely to increase the budget if I was dissatisfied with some of the others being discussed.
2. Twenty years ago (when I bought my Snells), I had some larger BA speakers on my short list, at first really liking the top end, then grew tired of it once I heard the Snells. I guess I would have called the BA "airy", and the Snells "accurate, with just the right amount of warm". After a lot of back-and-forth listening, I decided that, to me, the "airy" was somewhat artificial, although that is a completely personal opinion. So, BA had (probably completely unfairly, given the hugely different circumstances and 20 years) been relegated them to the category of "Speakers many people like but I do not". If others can chime in about the E60s, given my situation, let me know!
The E40s should probably still be in the hunt, but I am having a hard time finding places that would take them back after purchase. Also, I figured the dual 4" of the Ascends (even sealed) probably beats the single 4.5" ported woofer of the E40s.
I will be happy for you, with whatever choice you make - and I do
understand certain budget restrictions.
This is a different type of Boston speakers, compared to the ones
in the past - they are also more high end. We all, may hear things
differently - however, the E60 and E40 do not sound airy or artificial
to me. They can throw a good full soundstage, within their radiation
pattern. They are open, transparant and dynamic, with good extension
and depth > and are still focused with a good central image. This is
how they sound and perform to me - I do not quarantee that you will
feel the same way. Also there will be a compromise, when you place
them in your restricted setup. To me, Boston really stepped it up with
the E and VS series. I am hard to please, and I really like them.
AC4L, has a return policy.
DiscountJungles on Amazon does have a return policy - however, may be
with a 15% restocking fee.
Enjoy your adventure, and good luck.