Go with the advice you have gotten so far

Modern slalom boards are easier than 90's ones. Wider means more stability and better upwind but you can have tuck on the rails. I haven't had a board trip in years (touch wood), but it was a relatively common thing when pushing the old stuff.
Modern freerace stuff is quick & nice to use. For a given volume the freerace stuff is often about 5cm narrower (so can be slightly better in the chop) than the full on slaloms which are designed to have good acceleration etc. Speeds wont be that different unless you spend time on board & many of the freerace boards & sails are actually quicker on average.
The freerace stuff is also built a bit sturdier than the full on stuff. The biggest problem is fins if you have tuttle, alot of the freerace boards are still trimbox.
Thumbs up for the F2 RX, Fanatic Ray & Naish Grand Prix (im a little biased but they are all solid, fast & nice to use). Although a little old the Starboard S-types were good, don't know if the replacement (Futura) is quite as aggressive. Havent ridden the JP's.
Obviously there are alot of cheap slalom boards around at the moment because racing is quite popular. All are certainly user friendly enough, it is just how solid the boards are is the problem.
My one tip with them all is use longer harness lines than you used to, start with 26's