Hello Andre,
The DeCapo i and 626Ribbon are extremely different speakers; a very apples to oranges comparison. This is a case where you should take the opportunity to listen to either speaker before deciding on which matches your preferences. The DeCapo stresses dynamics and coherency, and might be a superior nearfield solution. The 626R (standard or Signature) is extremely transparent, very detailed, musical, and has more impactful and deeper quality of bass IMO. Whether you prefer so much detail in your playback is for you to decide - as this can really irritate with poorly recorded albums. What sort of music do you enjoy? How loudly do you like to listen? What size is the room?
The standard 626R is a must-audition $3k and under option (retails for $1690), where the 626R Signature (TRT caps, FS Tweeter, Soundcoat) is a world class monitor regardless of pricepoint. Yes, it really is that much better.
We do offer a full refund policy on all VMPS speakers with a generous trial period, if you would like the opportunity to listen with little risk. Please feel free to contact for more information.
Kind Regards,
Rupesh