I also have 1.25" & 2" Barlows. I find that I use them both!
But I have 2" EP's as well, and it is nice to have a big view thru a big piece of glass.
Also, something to consider: If you get a 1.25" barlow you can only barlow 1.25" EP's. If you get a 2" Barlow you can Barlow both 1.25" & 2" EP's.
Up to you.
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