Replying to Bacon Size

Feel like a gaper for asking, but im going to buy a pair of bacons soon. 5'10 160. I live in mn so they'll get a few heavy park laps in this year. Buying them b/c my lizzies are toast after over 200 days on them. Taking a few trips out west this year and skiing trashed and dead lizzies in pow is not an option.

I've skied a few pairs of lizzies the past 5 years as my only ski. This included years living in CO and using them for pow as well. So basically i've been on a 172 the past 5 years and loved it, but they're lizzies so its different.

Are the 184's going to feel huge lapping a 200ft hill? or will the 178 suit me better?

Where do they measure the 184 on lines? Aren't lines usually measured shorter than other companies? (184 line = 188 k2?)

Thanks