Re: 954rr or vtr 996?
Im on a VTR1000f at the moment after selling my SC28 for a TRX850 (dont hate me), and having the t-rex wrecked for me.
They are a good bike but have some shite quirks; gauges that are hard to read (especially 2nd gen), horrendous mileage, CCT's that are waiting to let go, clunky gearbox, mushy brakes, hydraulic clutch that is sub par to most cable clutches and can get a bit "grabby" and try to throw you off the bike at random inopportune moments, and agricultural suspension. All of that can be remedied, ridden around or learned to love of course and they are a great bike if you can get em cheap. Mine was really clean, came with Wilbers suspension and a big box full of the oem parts that came off it and was dirt cheap.
The 954 is a better bike in every way. The rc51 is legendary but bears absolutely no relation to a superhawk, completely differnt bike from the ground up, and you will have to pay through the nose for a good one, money you could spend on something much more recent or exotic unless you were passionate.
As others have mentioned might even be worth adding VFR800 to the list.