Burgerunh,
Any chisel is better than no chisel. It depends on what you can afford.
If you want the best in my opinion, I'd go with the Jiffy Mille Lacs 2 piece deluxe chisel. You can break it down if needed and it cuts ice. Ask anyone that owns one if they are happy with theirs. Keep in mind, your gonna spend more than $18.00 for this chisel but is staying dry worth it? Ice picks, Flotation clothing, Whistles, PFD's are all good and people spend alot of money on them but they are after the fact. Spend your money up front on a chisel too for safety. It kinda reminds me of the Nils hand auger, again your gonna spend some money but it cuts ice (some times fingers too). If your gonna spend money, it's worth the money in my opinion.
Years ago, I had a "Eskimo like" chisel made. Still have it but the problem was the middle where the two points connect. It would get hung up on the ice (stopping point). Nice idea they took from Jiffy x 2. Some prefer it but I personally didn't like it, again better than no chisel.
I like the Mille Lacs stepped single row points like an ice pick.
Whatever you get, carry it with you always. Comes in handy for other uses too.
JIGGIN.