Not much to go on since I don't have any first hand experience. Good pic of the 23's wave on this guys ad.
Have you seen the boats in person and can you get them on the water this time of year? They both look clean from the pics, but seeing them in person would help. It's obvious the Tige guy put some decent money in that boat recently. This time of year cash talks so start low on any offers.
High quality ballast setups can be had for $1k-$1.5k plus install.
Hope this is at least a start for you.