The bigger the better IMHO but what's even more important to me is the heavier the pieces the better. And I think the bigger the pricier so that may be an issue as well.
I don't think anyone else can make your mind up for you here. JOL is a reputable dealer but so are several other outfits online you can buy from.
Here is one of probably dozens of blogs about chess sets/bds here:
http://blog.chess.com/NimzoRoy/nimzoroy-and-chess-set
Hello,
What is your size prefered with a chess set in wooden, 3,5" - 3,75" - 4" or 4,4" ?
I want to buy a chess set from Jaque of London and I hesitate between the differents sizes, I like the chess set JOL.
I use a 3,75" chess set in a club but I want a chess set for playing and analysis at home.