yah, i too was not a fan of the 350z's but definitely a fan of the 370z so i know wat you mean.
i think the clutch could get cumbersome if you're doing bumper to bumper traffic every day but for most driving it's not that heavy. my 04 G35C's clutch is heavier.
i think the base with sport package is the best deal out of the different trims and options. but that's just me.