As for budget, if you ask Tavelo, I'm sure they can get you an Arrow frame and handlebar for €1,400 (a little more in dollars). The fact is, you're getting a much better bike for €200 more. With Quick Pro and Winspace, you're already over €2,000, so I wouldn't recommend it.
I'm talking about €1,400 because there's a YouTuber in Italy selling the frame for that price; I imagine he's also an ambassador for the brand.
If I had to do it again, I'd buy that one with a grain of salt. If i'm not mistaken, for less than €3,000, you'll get a complete bike with Ultegra Di2, which isn't bad at all.
Personally, I've been very happy with the R088 model. When the frame (which I'm currently using) arrived, it had a quality defect in two areas, and without hesitation, they sent me another frame, so within a week I had everything fixed. You don't even see support like this from the most renowned brands.
If you'd like, I'm open to other suggestions. In any case, both the Tavelo, R088, and SC-R55D are excellent bikes. My advice: focus on the brand and use the one that makes you happy, you'll make your money back
