I sat on a ZX14R at the Cycle World International bike show here in Houston last weekend. Hell, I sat on just about every bike they had on display, just to say I'd done it. Hard to tell if you'd like a ZX14 just from sitting one one. For the ZX14R, I guess it's a matter of "For people who like this kind of thing, this the kind of thing they like."
I sat on an 2006 FJR1300AE too, and fiddled with the various vents and such. Again, hard to tell just from a sit if it would be "better" than my 2005.
I sat on a bunch of Ducati too....better come to the party with your own rear end padding for these. Harder seats even than I remembered! Padding was evident when you pushed down on the seat with your hand, but it had all the resiliency of steel after about 5 minutes of sitting.
Odd, that of the more than a hundred bikes I sat on, the Suzuki SV650 made the biggest overall impression on me. I could get used to something like this as an "extra" bike.