whacha gunna do wid da boat, eh boss?
Thats going to be one of the more important questions.
I own a cat27 tall rig (along with two other larger boats) and the cat27 is MY favorite one to take out for the day. myself. alone. Or with The Cuban. Perfect for two.
For overnight? just me? no worries, love it. For two or more? not so much.
I'm 5'11, 185, and The Cuban is 5'5" 11something, and we just fit in the vee-berth. Unless you and yours are circus midgets with a hankering for some gymnastics its tough to get out of the vee without stepping on an arm/head/leg. You may be into that, I dunno.
There is no way on gods green earth I would want 4 people on that boat for more than an afternoon.
But thats just me. We had the 13 year old and 5 of her closest friends out on her for over 9 hours and they loved every second of it... I almost gave birth to multi-headed serpents.
The Cal30 is a nice boat but, its darn near 40 years old. I don't care how well its been maintained. Its going to have issues. Big issues. If not now, then soon. Add in that it doesn't have but a couple of inches more beam than the cat27, you're not buying "that" much more room. Plus the entry to the vee is just about the same size at that of the cat, so you've got that to look forward to.
Don't let the atomic-4 scare you off, they're good engines.
You didn't say if you care how they "perform" but, you don't look at either of these boats if you're going to want to hang some meat off the side and race.
Yea, I know, they have both performed well within class, but these are cruisers, not racers.
I know - it doesn't help much does it
If you're looking to entertain, putz around, weekend party, things like that...look at a catalina 30, or pearson, or beneteau, or any number of other boats. You'll see a major difference in the cabin size.
or perish the thought, hunter