I wait for sales, buy 'scratch and dent' from the wholesaler, whatever it takes to get 'em cheap as I can. The price of the stuff inside would cost far more than buying it this way.
The condensors in them are amazing too. All high efficiency stuff, low speed is high enough to maintain ambient condensing temps.
But yes, I started buying the 20 plate heat exchangers. They're about 20 bucks more but they're worth the cost. It was very hard work getting the larger compressor to fit though. Not sure if I'll do that again. Had to heat and bend the outlet at the top into a 'bend' as well to get the height low enough.
I know the upsizing of the compressor and larger HX made the bigger difference, and I must have gotten lucky on the captube sizing as well. Just came together.
The condensors have been the same or close in all the small units, but I think it was a 'Ritetemp' or a Haier. I love the Rechi compressors in them. Quite a few are using them and they perform really well. Occasionally I get some oddball. Had a few strange chinese brands. They're fine, seem to last, but don't do the job that a similar size Rechi or even Toshiba for that matter.
Guess I could start including mounts for gpu as well. They're all tuned now for even the serious gpu loads. Be handy to have specs on the sizing and such. I should start playing with dual head cascades for SLI too. I should really get to having some evaps made too. If/When it sells I'm going to get the copper and talk to a guy here that can machine it for me. I'm almost out of heads again, and it takes a while and shipping costs, so making them here makes sense I guess.
But I sell 'em for about what they cost to make a lot of the time, not a lot more, so they tend to sell fast enough. Still, it's slower than it ever has been for PC stuff.
I have a local guy coming tomorrow to have a look, maybe get it, maybe a smaller cooler I put together, maybe both