judging a car's stock ride quality based on how it feels with 19's (when it comes with 17's or 18's) makes as much sense as swapping springs/coilovers and making the same complaint.
I'm a big nissan guy myself, but i have access to a G37 that i drive occasionally, and comparing to the 335 it feels very sloppy. its more comfortable in the sense that its more cushy and bouncy, but it has way more body roll, or at least it feels like it. that and the steering feels way looser.
that being said i'd never buy a 328 either because i dont like slow cars. :P why did you refer to the 335 as crap though?