I've tried none of the above, but I've been mulling the same idea so I can give my 2 cents.
For me the purpose would be to get a moderately sized refractor that will be easy for quick looks and for hitting the road with relatively little fuss.
My only foray into large refractors was a 6" F8 triplet, and while I enjoyed using it, it was a lot of messing around for 6" of aperture. I concluded that for that amount of effort, I'd rather use my 12.5" reflector.
That has led me to the belief that somewhere in the 120-140mm range is the spot I want to be. You get the benefits of a sharp and easy to use package, without the massive size and weight that a 6" gets you.
The Skywatcher esprit puts me off a tad because of the weight. It seems it's built heavily for imagers, and I'm strictly visual.
The Skywatcher 120ed varies in price a lot, and I've looked at getting one from the UK, but the poor mechanics has me thinking twice. There's other versions packaged with better focusers and sliding dew shields.
The Takahashi TSA 120 looks pretty sweet. The optical reputation is obviously excellent, and the weight is very reasonable. Looks like it is about the same as my Televue 101. The only real sticking points on that one is that refuse to pay U.S. domestic prices, so I'd be looking at shipping from either Japan or Hong Kong. In addition to the shipping lottery, there's the question of a gray market scope and warranty. I'd assume I'd have to deal with Takahashi in Japan if I had an issue.
Outside of these I have also looked at the 125mm F7.8 that Telescope Service has. Other companies do different packages, different focusers, and some do minimum strehl guarantees, but the price is a good bit higher (e.g., Stellarview did it for awhile, and Altair astro now).
Final considerations are a APM 140 doublet, or to push the budget and look at a used TEC 140.
Both look to be close in size and weight, and I think for me both are pushing it a little too far. I saw a TEC 140 at a star party and was surprised by how large the OTA was.
So, still in several minds, but leaning TSA 120 (if that's allowed).
Anyway, that was a bit of a screed, but I'm interested in hearing others though process on this.