The Titanium 125 is good, I've seen nothing but positive reviews by owners.
But I went to buy one in 2021 and it required pre-order for delivery 6 months later, so looked on Amazon instead. I discovered there are many dual voltage flux welders, that back then cost less than the Titanium. I bought an Amico. Now, 2.5 years later, I love it and still feel it was the better choice.
Choosing what to buy on Amazon - dual voltage is a huge advantage, it will do a lot more than 120 only. Use it on 120v with the included adapter when that's all that's available, 240 when you can. Project Farm on YouTube has reviews of various under-$200 flux welders. Amazon allows 30 day return, and alongside the welders listed is a third party 'extended warranty' offer that will assure you get four years use, for about $30.
Here's a review of the Amico I posted here. It references more details I posted over on Muhammad's Welding Site.
I just bought this and posted a review over on Muhammad's WeldingSite. Summary - I like it. Review: Amico MIG-130A, 130 Amp Flux Wire Welder, 110/230V Dual Voltage. $149 on Amazon.
www.tractorbynet.com
Perhaps now, 2.5 years later, there are better or even less expensive alternatives to the Amico I bought. Since you have experience with the MIG170, the Amico should be intuitive. But for a beginner reading this, the Amico's unlabelled controls might add complexity for the novice, so something with a more intuitive control panel might be a better choice.
Note my caution in my post: you want a welder that has US support, for an exchange, if that extended warranty becomes needed. So evaluate if the Amazon vendor is real or is just some guy who brought over a few pallets and won't be around next year. But worst case the warranty company would just refund you, so there really isn't much risk. And the warranty company told me they have surprisingly few claims. Modern electronics have resulted in decent quality inexpensive welders.
In summary the Titanium 125 is a good choice but I think dual voltage in the same price range will expand what you can do.