Hi ELMO
(Love your arcade machines; reminds me of a slightly misspent youth in late night cafes, and, motor-cycles. Great to see the Festool jig-saw, and, Festool circular saw/guide shown in your construction photo’s – clearly someone with refined tastes – lol.)
Your query though relates to kitchen worktops, which in turn raises other questions.
As you have dust extraction, that’s one important thing out of the way – just leaving the choice of sander – with cost being a consideration as well.
However in thinking how to respond to your query, I hit a dilemma, summed up in panelchat’s post – what coating/finish needs to be removed?
Also, the ‘discussion’ link provided by SMSemenzer touches on (amongst other things) whether or not the worktops are fixed in position. This might influence the best approach for you.
Assuming that you can deal with corners and the like (if the worktops are fixed) then the ETS 150/3/5 would seem ideal for what you want to do, and, can afford right now.
There are quite a few posters who reckon they can’t tell the difference in the finish obtained between the 3mm or 5mm stroke ETSs.
That being the case, then perhaps the ETS150/5 would suit – that would give you the option of using courser grits more efficiently – whilst still enabling you to get a ‘fine’ finish.
The ETS150/3 is, of course, considered a superb sander in its own right.
Suggestions regarding which abrasives/grit size, would be easier if you could tell us what needs to be removed from the worktops, and, what the final finish is to be.
Otoh: how about scraping the existing coating/finish off, and then using your existing little palm sander – ok, ok – probably a step too far??
Be great to know how you get on – good luck.
Richard.