You didn't say what your budget was. There are many opinions on the welded vs rivetted hull question, some have valid rationale, some just personal preference.
Personally, probably the best bit of advice that I can give you is do your homework first. The manufacturers sites, sites such as OFC, owners clubs.
Once you establish a budget, stick with it.
The boat show is an awesome place to get the juices flowing, but it's also an easy place to get caught up in the shine and glitz and fall prey to our impulsive sides where our brains fall into our shorts! No doubt it can be a place to save anywhere from a few hundred to a few thousand, but make sure you are in control by going with a plan in mind.