Hi,
I'm currently playing the old benoni 1... c5 defense against 1.d4. I think I'm doing well but I'm not sure if the dutch defense is better. Can someone give me their opinnion?

Define "better".

They're both playable openings. It really depends on what you're more comfortable with. We actually have a few Dutch players here at CF, including myself, so you're more likely to get advice on how to play it well than if you ask specific questions about Benoni positions. But it really depends on what you like.

If you do decide to try the Dutch, start with GM Neil McDonald's book "Starting Out: Dutch Defense". It's an excellent book with introductory coverage of all three major lines of the Dutch, plus the anti-Dutch lines.

--Fromper

Better in terms of what? Advantage? Counterplay? Amount of weaknesses?

Having played neither defense, I would say that the Dutch would be my suggestion, if only for the fact that it attacks a central square, and easier to find resources/advice for (including members of ChessForums).

Both have their respective drawbacks. The Benoni can get overrun in the center if Black isn't careful, and the king position in the Dutch can get a little open.

The Old Benoni is a bit more dangerous than the Modern Benoni, where black 'move-orders around' to avoid some of the 'graveyard' lines. It's alright though, I've played it myself for a short period, it didn't agree with me.

The Dutch is an underestimated defense at all amateur levels (including masters), it's quite a decent defense and I've done well with it for years, constantly finding new things to try out..
Sometimes I throw in c5 when playing the Dutch and white has a habit of responding with d5, usually resulting in positions that I understand better and feel more comfortable with than my opponent.

It depends upon the general themes and if you know them or not. If you like playing an early c5 then play it as White too (1.c4)! As Black, play it against everything!

You can do the same with f5. Play 1.f4 and learn the many themes. Then apply them with both colors. It reduces your opening work and allow you to focus on tactics and endgames.

Become an expert in one or two things.

If you understand the positions better than your opponent, your winning chances are great!

Although your knowledge is extremely selective and you may win many games, but are you really improving?

Why, yes of course! In time, the openings will change and specific themes will be remembered. Simplifying one aspect and becoming good at it does not mean you'll NEVER be good at chess. It's a stepping stone. Winning more games isn't bad either. As I said, that leaves time for tactics and endgames. Are these a waste of time too?

It's just a suggestion, so take it or leave it. (It has helped many of my students though.)

If you are interested in playing the Dutch, I can heartily recomend this DVD:
The Killer Dutch!! Arriving Soon in a Good Outlet Near You!! — Ginger GM

I hope Nakamura continues to play the Dutch at the top level. Anand was right that all he sees now a days is Slav Slav Slav. I think that a lot of theory on the Dutch is relatively untested, and if these top players have to work on it in the next few years, then there will probably be many improvements for each side and lots of interesting chess along the way. I hope Naka is not discouraged by his loss to Kramnik and continues to employ it.

Is this just a video, or is it one of those DVD's that you play in Fritz or something? Also, does he cover all variations of the Dutch? I have Simon Williams' book "Play the Classical Dutch", which is a pretty good reference for that line. I'm not sure how much he plays other lines of the Dutch, since he only shows his own Classical variation games in that book.

--Fromper