I have both a first and second gen SV650S and an SV1000S. Itís really a toss up between my 2004 650S and my 2004 1000S as to which one Iíd take over the other one. The first gen was my first, and what prompted me to get the other two SVís anyway. All have no PAIR system installed (2001 never had it). I put a second hand Ohlins rear shock, racetech gold valves and springs with different oil in the forks, M4 full race exhaust, stainless brake lines and HH pads on the brakes, and PCv with a Dyno tune on the 2004 650. It is very well sorted now, and I adore it! Much faster than the 2001 carbed model. I love that I can ride it hard, and not be at 150mph. It plays double duty on street and track days. The SV1000 got forks rebuilt with adjusted oil level, TRE mod, Holeshot performance exhaust, and it is much quicker than it was bone stock when I bought it. I also put a later model flywheel (2006 and on) that weighs half of the stock one, after finding loose but undamaged magnets on my stock one. Both are pretty low mileage bikes. The first time I rode the 1000 after servicing the forks with new seals and fork bushings, I cornered all the way to the edge of the tires. It is very easy for me to turn it hard and smooth. Turn in effort is more than the 650, but not bad. People complain about the weight, but I donít really notice that itís heavy. I have 7 bikes in all, and it is definitely subjective. It is so stable! It is obviously quicker by a large margin than the 650. I have to be very deliberate to be that smooth on the 650. It is a scalpel, and it demands my attention because of its ability to change direction/line mid corner. A really rough bit of pavement for example will cause it to change lines if Iím not attentive. The 1000 just doesnít do that. Granted, the 650 is a more purposeful sport oriented bike, but that is the way it is. I spent some money on both bikes, but have less than $3000 USD in my 2004 650, and $3500 in my 2004 1000 after all modifications. Iíd be happy with either of them, and crushed to give up either one of them. But if I must choose, Iíd choose the 1000 50.1% to 49.9% over the 650. Because of the smoothness, and the noise. It sounds magnificent! Even at idle, the gears in the valve train with their melodious whine, and the chugga chug of the engine working. The holeshot exhaust barks at the twist of the wrist, and the bike is just a great place to be when riding it!