I have friends with the chicago electric versions and they weld respectably but there's compromises with the 4 voltage settings and wire speed knob apparently... they've done some impressive things with them... The Titanium welders are very adjustable and weld nice though, I've put my 170 through some serious abuse trying to break it and it won't stop...
I did pay full retail (just shy of $800 if memory serves) for the Unlimited 200 version* of it and use it here and there, they're almost identical, but if I'm doing anything questionable I pull out the 170, gone through at least 15lb of flux core, blown breakers with it, killed a GFI outlet, ran it off of several generators even to the point of stalling out my 4kw generator until I found the sweet spot...
Wander the open box section after christmas, you might find a heavily discounted Titanium, there was a 170A version for $350 at one of my local stores not long ago, but yeah, the used market is good to look through, Everlast is apparently really good for import stuff too...
*Yes, I might have a welder problem... 3 stick welders and 3 wire feed welders as well as a plasma cutter and an O/A torch setup... the 90A flux welder is at my brothers though...