Not a lot of Quick folks here but I have a 7 and a 3. I found the 4 was a three chainring setup on a 3 frame. More gear options on the 4 but much of the same otherwise except the quality of the components are more of a road bike type on the 3. The 3 also has disc brakes and a carbon blade fork. the new 3 has a full carbon fork and the wheels and tires really make it a fun ride. I keep my 7 for easy riding and going to the store and my 3 is what I can handle as a road bike due to my physical issues. The Marin is a fine bike though I have never ridden one. That said it comes down to what fits you best as a frame and then gearing for your roads and use. I have no reason to sway you one way of another but the Quick frames fit me very well. Try to get a ride on the Quick, the 3 is the same frame as th 4, and consider the fit and your options to adjust either to fine tune to your physical fitness now and then down the road.
Hope this helps, Frank.



3 & 7