Hi, "EF"!
I think we need to put the horse back in front of the cart, before we go any further. What power requirements do the projects that you have in mind (and those that might cross your mind in the next few years!) have?
Probably 30V and maybe 3A will cover most requirements. A power supply with TWO such channels will allow you combinations of +/- 30V at 3A, 30V at 6A (parallel the two supplies), or 60V at 3A (two supplies in series). Unless you have any high power aspirations, that's going to cover most hobby electronics, I'd suggest.
You've talked of precision - cheaper supplies will display volts to only 1dp (i.e 100mV resolution) and 2 with current (i.e 10mA resolution). Better ones will offer 2 and 3 decimal places respectively, so you are down to 10 mV and 1 mA display resolution (which, admittedly, is NOT the same as accuracy!). For a POWER supply, I'd suggest three decimals is very nice and handy to have.
Remote sensing? You'll only ever need to use such a facility if
1. you are powering something at a significant (>2A?) current
2. your interconnect leads are either long, or thin, or worse, both!
3. your load is really fussy about a "sagging" power supply (which suggests a design issue with your load, straight away)
I have remote sensing on my main bench supply, but have yet found the need to use it! Appropriately dimensioned interconnects answers most issues, here, IMHO.
Some cheaper power supplies - especially fancy digitally controlled ones - do
VERY RUDE THINGS when you turn them on. Enough voltage spikes to fry your sensitve load, in some cases. These power supplies are clearly a FAIL , and are to be avoided at all costs.
Well, You've seen my own analogue TTI tripple channel power supply at work, first hand!
I've owned it for two years, and do not regret the decision to buy. They are built here in Blighty, so not too sure how many of them will have found their way across the pond. eBay is always a good source...
I admit that some modern power supplies now give the added function of being able to set voltage and current limits digitally. Nice, but not essential (to me). The Rigol unit seems very well spec'd for the money (if you can get your head around the fact that the 12-year-old who designed the front panel didn't attend school the day they taught man-machine interfaces and ergonomic keyboard layout - EURGH!), and meets the above requirements (of mine!). There are some more professional looking, even more capable (more than necessary??) supplies from Rigol, but they cost a little more, of course.
You will know what people (IBM people??
) used to say about buying IBM!.
"Nobody ever got fired for buying IBM..." Well (probably) nobody (with the budget) ever got fired for buying Aglient, either. Of course, their gear will be beyond reproach, but boy, do you pay for that. Some EVBLOGGER will now tell us that they knew a bloke whose friend heard of somebody who bought an HP/Agilent power supply from a mate once, and it blew up. Well, we can put such stories some way further down the list than exploding Korads...
Based on what you and I have spoken of, before, an Agilent supply (of appropriate voltage and current specs) is going to
more than meet your needs, EF, I would suggest. And that's no bad thing, but you are paying for it.
Siglent gets a mention in this thread - they tend to be towards the budget end of electronics equipment, but possibly (I just don't know) fine for hobbiest use. But you have to ask yourself how well
any product that you couldn't fix yourself is going to be supported in your country. To quote Siglent's own web site:
We believe when SPD3303 on sale, instruments market will meet a power storm, it worths the wait! A "power storm", eh? I think I can imagine what any manual (which may or may not be supplied) will read like